319 lines
14 KiB
Plaintext
319 lines
14 KiB
Plaintext
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Uploaded by: DICK SMITH
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Date: 07/21/86
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===========================
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! !
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! Infrared Viewer Plans !
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! !
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! Written By Dick Smith !
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! alias The Ghost !
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! !
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! 7-13-86 !
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! !
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===========================
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[Introduction]
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With the advancement of technology the cost of building infrared viewers have
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come down considerable since they were first used during the Korean Conflict.
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The following plans show how to construct a device capable of allowing one to
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see in total darkness. It can be used to view a subject for recognition or
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evidence gathering reasons without any indication that he is under
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surveillance. Many uses such as detection, alignment of IR alarms, lasers
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communication systems and other IR sourses make it an incaluable device in
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these fields. Detecting diseased vegetation in certain types of crops from the
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air, an aid to nightime carmit hunting as well as viewing high tempeture
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thermographic scenes providing the color temperatures are sufficeint.
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The unit is built with cost and performance as the objective. It is as good
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operationally as units costing 3 to 5 times, yet is lighter and mor versatile
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than the more expensive ones. The baterries are enclosed into the housing and
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do not require side packs, cables, etc. The range and field of viewing are
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determined by the intensity of the integrated IR source and viewing angle of
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the optics.
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The viewing range is determined mainly by the intensity of the IR source and
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can be controlled by varying this parameter. A two cell flashlight with an
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integrated filter placed over the lens to prevent the subject from seeing the
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source. This provides a working range of up to 50' (reliable) and can be
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increased to several hundred using a more powerful source such as a 6 cell
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flashlight. Needless to say, the builder has total flexability in choosing
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his/her IR source and can adjust the optics to meet his needs.
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Example: Long rage quick viewing may utilize a small 2 cell light with 8
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Nicad cells to replace the normal 2 "D" cells providing a significant brighter
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IR source yet lasting for less time than the normal "D" cell wouyld. The unit
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can also be used with external soures such as a super intense filtered
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automobile headlamp extending the range out to four to five hundred feet and
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provide a wide field of illumination. Note viewing of active IR sources as
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lasers etc., do not require the internal IR source.
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[Theory of Operation]
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A subminatur* high voltage power supply provides approximately 15KV at several
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micro amperes from a 7 to 9 volt rechargeable NiCad battery. This volatage
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is applied to the (TUB1) with "plus" going to the viewing end and "negative"
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to the objective end. A voltage dividing network consisting of resistor R8,
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10 and R9 provide electronic focusing via the grid ring.
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An objective lens (LE1) [I used an 80mm - 205mm zoom lens from a camera] with
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adjustable focal length gathers the reflective image, illuminating by the IR,
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and focuses this image at the objective end of the tube. Image conversion now
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takes place inside the tube and is displayed on the viewing to provide subject
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indentification at a distance to 50' or more-depending on the intensity of the
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IR source and quality of optics.
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[Construction Steps]
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1. Assemble and test the power board. You can us any type of power supply
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that can supply a voltage between 15KV and 20KV. It happens I found
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it easier to buy a kit rather than to search for the parts separately.
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2. Solder R9 between the "focus ring" terminal [the middle one] and the
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viewing ring. THis must be done quickly wiht at least a 40 watt soldering
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iron the "glass to metal" seal may be damaged if allowed to heat up. Note
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that the resistor is dressed as show below:
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------------
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----| R8 |----: You have to remember that high
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------------ | volatage can travel through
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------------ | air. If the resistors are not
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:----| 22M |----: set up properly arcing can
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| ------------ occur thus reducing the
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| ------------ potential voltage at the
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:----| |---- out of the terminals. Also it
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------------ make viewing hard.
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The +HV lead from the power board is connected to the viewing ring.
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3. Solder R8 between the "objective ring" and the "focus ring". Note that
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the resistor may be a combination of one or seeveral resistors and it may
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be wise just to solder a short piece of buss wire to the objective ring as
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a connection point for these possible combination along with the negative
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HV lead from the power board. Note the differenct combinations of
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resistor that may be required. CAUTION! DO NOT SOLDER NEAR THE GLASS SEAL!
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4. Obtain some window screen and place it flush against the objective end of
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the image tube TUB1. Secure the tube on the bench via modeling clay etc.,
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and temporarily connect to the leads from the power board. Observe proper
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clearance of leads and componets. Note the tube glowing greenish and an
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image of the screen appearing either sharp or blurred. If image is good
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and sharp you are in luck. If not resistor R8 must be trimmed by either
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adding or reducing until the image of the screen is sharp. This step
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elctrostatically focuses the system. The lab values were 2000 Meg for R9
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and approximately 200 Meg for R8. You may use a combination of 100 and 22
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Meg 1/2 Watt carbon resistors or a single 200 Meg use RTV to further
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secure the resistos and insulate the HV points against possible corona.
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5. Once you have got the IR tube focused you can now enclose the whole system
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in what ever enclosure you wish. I used:
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Quantity Discription
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-------- ------------
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1 2-1/2 Inches Of PVC-40 tubing
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1 5 "
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1 8 "
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3 2 Inch PVC connector
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3 Metal Clamps (pipe clamps)
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Diagram: [Not to Scale] Top view
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-------: :-------: :-------: /---\ /--------\
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| :------------: :---: :-- ------ |
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Viewing |Con. : 5" PVC : Con. : 2 : Con. : Zoom lens |
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end | #1 : : #2 :1/2: #3 : LE1 |
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(EP1) | :------------: :---: :-- ------ |
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-------: :-------: :-------: \---/ \--------/
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----------------------------------
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| Power Board Inclosure |
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----------------------------------
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Clamps go around Con. #3 to hold Zoom Lens in place, around Con. #2 and
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Con #3 again to hold Power board inclosure next to Viewing tube.
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You can add whatever else you need to the assembly to fit your needs.
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6. The viewing lens (EP1) goes at the end of the tube right before Con. #1.
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The Image tube is squeezed together between the 5" PVC, Con. #2, and the
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2-1/2 " PVC piece. It is best that us use a rubber washer to hold the
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image tube in place so that it doesn't move around inside the inclosure.
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[Parts List From Infrared Viewer]
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Quantity Part # Discription
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-------- ------ -----------
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1 PBK3 Power board assembly 15KV to 20KV power supply.
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Available from Information unlimited.
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1 R8 200 Meg resistor (see above reading).
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1 R9 2000 Meg resistor (see above reading).
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1 TUB1 Selected 6032 Image tube. Available from
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IR Scientific.
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1 LE1 Lens (Camera Lens seem to work the best).
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1 EP1 X 10 eyepiece or whater works the best.
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1 IRF1 Infrared filter for fitting in place of
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a light source (flashight etc.).
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1 FLH1 Light sourse.
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It is advisable that you uses high voltage wire in this project, especially
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if you intend to enclose it in a small enclosure. This is because due to the
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nature of High Voltage it can pass through the regualar insulation which
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covers low voltage wire. This results in arcing which is bad because basicly
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what its doing is shorting out your power supply which is a no no.
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[More Diagrams]
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Another way of assembling your viewer.
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\----\ _
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\ -|B|-------------------------------
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IR - | |r| Flashlight |
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Filter | |a| |
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/ -|c|--------------------------------
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/----/ |k|
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:-----|e|------------------------------------/
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:---: |t| /-- /\ Tub1 -----/
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LE1 : |_| | |---||------/\ : | EP1
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: | |---||------\/ : | <-
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:---: \-- \/ -----\
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:--------------------------------------------\
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/ /
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/ / Power Board Enclosure
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/ /
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/ /
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/ /
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/ /
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|________|
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[Where to Get the Parts]
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Information Unlimited Sells A Power Board Assmebl* Kit which will work with
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this project. There address is:
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Information Unlimited
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P.O. Box 716
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Amherst, New Hampshire
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03031
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PBK3 - SUB MINI 20,000 VOLT POWER MODULE
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PBK3 Plans..................... $7.00
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PBK3K KIT/PLAN.................. $44.50
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PBK30 ASSEMBLED & TESTED........ $59.50
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Thie* Toll Free Order Number is 800-221-1705
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8 AM - 4 PM Eastern Time.
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For Information & Assistance and to place orders after hours: 603-673-4730.
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IR Scientific Inc. sell the 6032 Infrared converter Tube which is used in this
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project. Their address is:
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IR Scientific Inc.
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Box 110
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Carlisle, Massachusetts
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01741
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You can call them at 607-369-7118
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6032 Infrared Image Converter Tube, it costs $67.50.
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You should Us 100 Meg resistors to make up your resistor network. I suggest
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that you go to an electronic surplus store to get these, there not easy to
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find.
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If you decide to try and make your own power supply RCA builds high voltage
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diodes you could use. Check out their cross reference manual, they have
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diagrams showing how to make voltage multipliers.
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You can get an IR filter from you local camara store at this time I believe
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that you can get 3 square inches of gelaton IR filter for about 10 dollars.
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But if you really wanat a good filter, the ones made out of glass, it can
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run you anywhere from 60 to 100 dollars just for the filter.
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[Warning]
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Unless you are competent in building projects I don't suggest that you try
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building this project. It can cost a lot of money if you have to keep
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replacing componets. If you still want an IR viewer see below for places to
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purchase them.
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Also a lot of states have made it illegal to have IR viewer so check with
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local authorities to learn the law on the pocesstion of one, then buy one.
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[Places Which Sell IR Viewers]
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If your lucky you may be able to pick one up at an army surplus store. I've
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seen acouple and there very nice. There about the size of a pair of
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binoculors. Buy one of these if you find one. Cost: unknown.
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Information unlimited sells some.
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GVP1 - General Purpose Viewer $299.50
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LRV1 - Long-Range Viewer $750.00
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HLR1 - High Power 200K Candle Power $139.50
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IR Source
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I believe that IR Scientific sells some, but I'm not Sure.
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The Electronic Supermarket sells some.
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The Electronic Super Market
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P.O. Box 988 Lynnfield, M.A.
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01940
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Phone (617)-532-2323
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IR Eye Infrae* Viewers Model ELT ( 3VL0144p) $299.00
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" Model ELC ( 3VL0145p) $299.00
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Infrared Views Kit (R3VL0153p) $199.00
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Instrutio* Manual ( 3VL0154p) $ 10.00
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Long Range Infrared Viewer (85VL0376p) $729.95
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Long Range Infrared Source (85VL0382p) $129.95
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There are lot of other places that sell this type of stuff you just have to
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look around.
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Have Fun.
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The Ghost
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<--- Smith --->
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The PIRATES HOLLOW 415-236-2371 ;(
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Another file downloaded from: NIRVANAnet(tm)
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& the Temple of the Screaming Electron 415-935-5845
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Just Say Yes 415-922-1613
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Rat Head 415-524-3649
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Cheez Whiz 408-363-9766
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Reality Check 415-474-2602
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Specializing in conversations, obscure information, high explosives,
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arcane knowledge, political extremism, diversive sexuality,
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insane speculation, and wild rumours. ALL-TEXT BBS SYSTEMS.
|
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|
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Full access for first-time callers. We don't want to know who you are,
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where you live, or what your phone number is. We are not Big Brother.
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"Raw Data for Raw Nerves"
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