LOAN OF(Sanitized) MLT1540 LIGHTTABLE FOR TRAINING PURPOSES

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000400030114-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: June 7, 2005
• Sequence Number: 114
• Publication Date: January 8, 1971
• Content Type: MF

Division, TSG
X1
X1
X1
Approved
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sonar
Release Strtrt CIA-RDP78BOIVA0004000301140
t (
5
NM 1540 Light Tables S and 004 have e delivered to
for training osee. These thb1a have not been contractually
s yet and, as Such, are mat WIC property, and caution should
be exercised so that no dowse is incurred.
2. These tables are not acceptable contractually far the reasons
listed in Attachment 1. Steps are being taken at this time to have these
deficiencies corrected.
3. It sheald be reiterated that a safety hazard exists on the loca,
operetion of the tilt switch. 'MG personnel have been advised
Atte
List at Contra
Chief,
Distribution:
1 .,.
c/T
Declass Review by NGA/DoD
Approved For Release 26E@REFI
TSG
6101/d I
ANSZATM
declass***
1A000400030114-4
Approved For Release 2005/06/23 : CIA-RDP78605171A00
191%
CJ AxQog (L IWA391) NL PDB TDIW FAX LOS ANGELES CALIF JAN 7
WESTERN UNION' ATTN TELEPHONE [phone]
WILL CALL 3109 WILSON BLVD ARLINGTON VIR
,SUBJECT:
REFERENCE CUSTOMER LETTER OF 4 JANUARY
C1971 ON LIGHT TABLE DEFECTS. 4. WE SUBMIT THAT NO SAFETY HAZARD
EXISTS. OTHERWISE WE. WOULD HAVE ALTERED TABLE DESIGN. THIS
.FIRST UNIT WAS THOROUGHLY EXAMINED BY YOUR PERSONNEL IN LOS
0ANGELES., IF YOU ELECT,
WILL ACCEPT A SCOPE CHANGE TO
'CORRECT THE SITUATION, 2. THIS FAULT APPEARS TO BE UNIQUE TO
PTABLE S/N001, AND DOES NOT APPEAR ON THE ATTACHMENT NO, 2 REGARDING
rTHE INSPECTION OF 14 PRODUCTION TABLES. OUR YIELD SERVICE REPRESENTATIVE
WILL INSPECT AND CORRECT THIS DEFICIENCY ON S/N001. 3. MS26565
DOES,NOT COVER THE DIMENSIONS OF A 6.6" REEL,' TOOK THE
'POSITION THAT 6.6" FILM WIDTH BE IN EFFECT SUBSTITUTED FOR
THE 5" FILM WIDTH IN SAID STANDARD AND EXTROPOLATED APPROPRIATE
HDIMENSIONS FROM THE 5" SPECIFICATION, THIS RESULTED IN A DESIGN
1
WHERE THE MAXIMUM...TOLERANCED REEL WOULD BE NO GREATER THAN
6.782...INCHES, THE PROTOTYPE PREVIOUSLY DELIVERED AND EVALUATED
;BY YOU AND UNIT SERIAL 001 INSPECTED HERE IN LOS ANGELES BOTH
INCORPORATE THIS DESIGN.
UNDERSTANDS THAT CURRENT 6.6"
REELS AVAILABLE TO THE CUSTOMER EXCEED THIS NUMBER AND THE
1CRITICAL NATURE OF THIS PARAMETER. WE WILL IMMEDIATELY INSTITUTE
iA CORRECTION WHICH IS FIELD RETROFITTABLE AND FACTORY IMPLEMENTED,
777'IN
AND WILL SUBMIT A CLAIM COVERING THIS SCOPE CHANGE. 4.
4
HSUBMITS THAT THE TABLE COMPLETELY MEETS THE REQUIREMENTS OF
PARAGRAPH 3.41.2, AND THAT THE CABLE CAN BE EASILY MOVED ASIDE
BY THE OPERATOR AS A METTER ROUTINE PRACTICE..5, THE COLOR
.7,1C0DING ON 'MOTORS IS MEANT ONLY AS A VISUAL REFERENCE. GUIDE
EAND THE PRECISE POSITIONING IS OBTAINED BY MECHANICAL DETENTING
ILNI WHICH AN OPERATOR CAN FEEL LOCK-IN. WHEN MOTORS ARE USED
77
IN THE SPLIT VERTICAL MODE, THIS VISUAL REFERENCE CAN BE OBTAINED
:BY USING THE LEFT REAR MOTOR ON THE LOWER RIGHT POSITION AND
VTHE RIGHT REAR MOTOR ON THE LOWER LEFT POSITION, MOTORS ARE
EASILY INTERCHANGED BY SIMPLE PLUG-IN OPERATION.,
YTHAT DESIGN MEETS THE REQUIREMENTS OF 3.3.1.2 6.
SUBMITS
RECOGNIZES
CTHE CONDITION OF LOWER COVER BEING PREVENTED FROM OPENING WHEN
THE TABLE HAS SHIFTED IN ITS HORIZONTAL POSITION RELATIVE TO
r77,ATHE ELEVATING STAND. WE WILL MAKE AN INLINE CORRECTION TO
-
' PREVENT THE TABLES FROM SHIFTING; AND PROVIDE FIELD-INSTALLED
PLUGS TO HOLD THE TABLES IN THE CORRECT POSITION. OPERATIONAL
PROCEDURES WILL REQUIRE THAT THE TABLE BE LOWERED TO THE HORIZONTAL
QPOSITION FOR LOADING THE IN-LINE VIEWING OF TWO SIMILAR-WIDTH
'5FILMS. AND THIS IS A SIMPLE OPERATION. 7.
RECOGNIZES
THE INCONVENIENCE OF THE TAKE-UP LOOK BEING BLOCKED IN ONt
? '
-"DIRECTION DUE TO THE CABLE GUIDES, AND WILL MAKE AN INLINE
CHANGE TO CORRECT THIS AND PROVIDE A BASIS FOR FIELD RETROFIT.
g? THE LOCATION OF THE LOWER COVER LATCHES ARE THE RESULT OF
A'DESIGN TRADE-OFF FOR SAFETY AND CONVENIENCE OF THE OPERATOR
IN THE KNEEWELL AREA.
SUBMITS THAT THE OPERATION IS
0i SIMPLE ONE, IS NOT AN OPERATING CONTROL, AND IT MEETS THE
REQUIREMENTS OF PARAGRAPH 3.2.1.4. 9. PROVISION HAS BEEN MADE
1-'0R ADJUSTMENT BY FACTORY TRAINED PERSONNEL TO BALANCE THE
TWO ILLUMINATION SOURCES IN ORDER TO MEET THE REQUIREMENTS
jOF THE FIRST PORTION OF PARAGRAPH 3.1.1.1.
' ? 7.7,,77
WILL ENSURE
rTHAT FACTORY CHECKOUT PROCEDURES WILL COMPLY WITH THIS REQUIREMENT.
OUR TRAINED FIELD PERSONNEL CAN CORRECT THE DIFFERENCE IN S/N002.
THE LIGHT SOURCE CONTAINED IN THE TABLE IS A SIGNIFICANT ADVANCEMENT
T'IN THE STATE...OF...THE...ART. THE REQUIREMENT TO EXCEED .3,000 FT,
'? r-LAMBE-RTSy?MEET?THE
DIMMING RATIO OF -6:1-7-;616-15ROVIDt?NO-VISIBLE
OBJECTIONABLE.FLIcXER-RESULTED IN DIFFICULT DESIGN TRADEOFFS.
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EXCEEDED ALL THESE REQUIREMENTS SIGNIFICANTLY. TABLE
:BRIGHTNESS HAS AN APPROXIMATE OPERATING RANGE FROM 100 FT.
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LAMBERTS TO 3,500 FT. LAMBERTS AND FACTORY ADJUSTMENTS ALLOW
THE GOVERNMENT TO TAKE FULL ADVANTAGE OF THIS INCREASED PERFORMANCE.
AS A RESULT OF THIS INCREASED BRIGHTNESS, THE REQUIREMENT OF
,
7,22THE SECOND PART OF PARAGRAPH 3.1.1.1. MIGHT BE EXCEEDED BY
A SMALL PERCENTAGE POINT FOR A SMALL PERCENTAGE OF THE TABLES.
"777'7.
CONSIDERS THIS TO BE OF LITTLE CONSEQUENCE AND THEREFORE
1IS SETTING CONTROLS FOR BRIGHTER OPERATION.. IF THE GOVERNMENT
DESIRES, COULD FACTORY-SET THE TABLES TO OPERATE IN
200 TO 3,000 FT. LAMBERTS RANGE SUCH THAT ILLUMINATION WOULD
rFALL WITHIN THE VARIATION REQUIREMENT. 10. RECOGNIZES
ITHE LOW RETAINING FORCE OF S/N001 PAD LOCKS AND RESULTING OPERATOR
iINCONVENIENCE. AN IN-LINE CORRECTION HAS BEEN MADE EFFECTIVE
WITH S/N002 AN WE WILL FORWARD A CORRECTED' MOUNT IMMEDIATELY
FOR FIELD INSTALLATION IN S/N001. 11. (A) THE TRACK ON THE
0LEFT SIDE WAS DESIGNED TO FLOAT AT ONE END TO PROVIDE EASE
OF BRIDGE MOTION. 11. (B) THE PLASTIC PROTECTOR COVERS ON THE
^
:1Y CHAIN DRIVES WERE DESIGNED TO HAVE ADEQUATE CLEARANCE SUCH
YTHAT THERE WOULD BE NO DRAG ON THE SYSTEM. HOWEVER, APPARENTLY
SOME MOTION OR DISTORTION TAKES PLACE DURING SHIPMENT:WHICH ?
CAUSES A SLIGHT INTERFERENCE.
HAS TAKEN CORRECTIVE ACTION
TO INCREASE, THE CLEARANCE AS AN IN-LINE CHANGE FOR FUTURE SHIPMENTS.
1..OR DELIVERED UNITS, SLIGHT ADJUSTMENTS BY OUR FIELD REPRESENTATIVE
:WILL CORRECT THIS MISALIGNMENT. 11. (C) HAS REVIEWED
THE DESIGN AND FEELS THAT THE POWER CORD REEL IS ADEQUATELY
ATTACHED TO THE TABLE. THE DESCRIPTION GIVEN IN PARAGRAPH 11. (C)
1REQUIRES CLARIFICATION BEFORE WE CAN MAKE FURTHER COMMENT.
11. (D) THE TILT MECHANISM WHICH CONTAINS THE MERCURY SWITCH
!IS THOROUGHLY TESTED, INSTALLED ANDADJUSTED PRIOR TO SHIPMENT.
THIS DEFECT APPEARS UNIQUE TOS/N001, AND WILL BE CORRECTED
7 _ _
C' BY OUR FIELD REPRESENTATIVE. SUBMITS THAT THIS DESIGN
SATISFIES REQUIREMENT. ALSO, ADDITIONAL INFORMATION IS REQUIRED
7----BEFORE WE CAN COMMENT FURTHER. GENERALLY WE ARE KEENLY AWARE
OF THE IMPORTANCE OF QUALITY CONTROL, AND ARE IN A CONTINUAL
IREVIEW PROCESS TO ASSURE THAT STANDARDS ARE ACCEPTABLE AND
:TOTALLY IMPLEMENTED. WE WILL CONTINUE TO BE ALERT TO THESE
-FACTORS AND INCORPORATE IMPROVEMENTS AS REQUIRED. 12. INASMUCH
AS THE ONLY METHOD OF MEASURING THIS PARAMETER IS IN THE SOLE
,JPOSSESSION OF OURGOVERNMENT CUSTOMER, REQUESTS DETAILED
INFORMATION AS TO HOW THE MEASUREMENTS WERE TAKEN AND, IN PARTICULAR,
'THE REASONS FOR THE VARIATIONS FROM TEST 1 TO TEST 2. WITH
rTHIS KNOWLEDGE FOR THE FIRST TIME, WE WILL REVIEW WITH OUR
SUPPLIER AND TAKE THE NECESSARY CORRECTIVE ACTION ON FUTURE
UNITS.
HAS INCLUDED THESE SPECIFICATIONS TO OUR LAMP
r- SUPPLIER, AND HAVE BEEN WORKING WITH HIM FOR A LENGTHY 'PERIOD
'
:IN AN ATTEMPT TO CLARIFY AND COMPLY WITH THESE DIFFICULT
;
PARAMETERS ATTACHMENT 2 (MAIN HEADING). ITEM 1 THROUGH 3 5 THROUGH 8
777
ITEM 11, WILL REPLACE GLASS AS REQUIRED. ITEM 15, THIS -
10 12 13 AND 14 HAVE BEEN CORRECTED BY OUR FIELD REPRESENTATIVE ITEM 4
THE FIRST 6 UNITS HAVE BEEN COLLIMATED AND BALANCE OF UNITS WILL BE
ACCOMPLISHED SHORTLY ITEM 9 JERKY FILM MOTION APPEARS TO BE SUBJECTIVE
NATURE OR OCCURING UNDER SPECIAL CONDITIONS. WHEN MORE
DEFINITIVE INFORMATION IS AVAILABLE WE CAN MAKE EXPLICIT COMMENT.
911.JS A SUBJECTIVE MATTER; PERHAPS A LIGHT SMOOTHING PROCEDURE
WITH FINE STEEL WOOL OR CROCUS CLOTH BY OUR FIELD REPRESENTATIVE
MIGHT BE APPROPRIATE CONFIRMING LETTER TO FOLLOW
932A EST JAN 8 1971
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Approved For ReJlease 2005/06/23 : CIA-RDP70105171A000400030114-4
List or uontractuai Defeo-Ls on Table Ser. No 001
Defects
1. The table tilts by lifting the back of the unit and hinging
on the front. This creates a hutcracker effect at the hinge.
The tilt switch is located very close to the hinge., 'and it has
been determined that an operator could very easily suffer crushed
fingers-While_operating the switch,.
2. The Y motion is locked when the table is tilted. This systet
is actuated by a mercury switch. The adjustment required to pro-k
vide this locking feature just after tilting starts, and to
release the lock after it becomes horizontal, is quite touchy.
The prototype table is just as likely to be locked in the horizon-
tal position as unlocked. If this is relieved, the carriage may
start to roll forward when tilting occurs before locking takes
place.
3. Using a gauge configured to show the maximum overall width of
a 6.6" film reel it was found that interferences exist at all.
reel stations. Further checks on the production models available
at that time showed that 23 of 2L. stations checked are too narroW
and will not accept the 6.822 inch dimension specified.
4. The cable which connects the focus mechanism to the power
supply and electronics at the back of the table prevents the
focus mechanism from realizing full travel to the back of the
viewing surface.
5. Markers are provided on the table to aid in placing the motors
and idlers for various film cotfigurations. The motors have
matching markers on one side. However, the motors must be used in:
such a way that the side not cOntaining the marker is in view.
Consequently, markers must be placed on both sides.
6. The MLT is made in two parts, an elevating stand and the light
table proper. If the light table is not put on the stand at the
right place, or if it shifts while being transported, the lower
Attachment 1
Conti-act References
3 1 nr.",
Para. (4) - Moving parts such as vettilatjnrT
fans, drive belts, or gear, shall be shielded o7?
enclosed to prevent inadvertent access by the
operator.
Para. 3.5.1.4.2 - A ManuarTbridge furnished with
tilting stand shall be prcr;rided with an optional
fail-safe override to prevent uncontrolled motion T
in the Y direction when the table is tilted. To
move the carriage in the Y,direction with the tabl
horizontal, it shall be neCessary only to rele
the Y friction;lock. In a. tilted position, a ai
safe interlock shall be activated prevetting Y
translation unless the interlock is purposely
defeated.
Para. 2 - The table shall accommodate spools ;
ranging up to and including the size of spool
specified in Military Standard MS26565-22 loaded
to Capacity with fiIM.
Para. 3.4.1.2 - With any of the microstereosco-ces,
fixed in the mount, and using the scenter of the
Scope as a reference; translation in the Y direct
shall be adequate to cover the full 15" depth of
the glass viewing surface.;
411
Para. 3.3.1.2 - A. visual reference scale and ind.e;
ing device with positive detents shall be provide
to allow accurate poSitioning of the brackets to
hold the various width;spoOls and assure accurate
tracking across the glass viewing surfaces of the
film parallel to the longitudinal axis of the ligh
table and to each other.
Para. 2 - Provision shall be made for viewing...
in-line viewing of two of the same widths, of 70m.
5", 6.6", or 9.5" wide film.
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Approved For Release 2005/06/23 : CIA-RDP78B05171A000400030114-4
cover is prevented from dropping by the tilt and elevating
switch housing. The lower cover will not open when the table
is tilted.
7. The mechanism which takes up the dead loop at the center of
the table employs cable guides which hold the actuating
mechanism in its track. These cable guides have profiles whidh
prevent the looping mechanism from reversing direction at one
point in its travel.
8. The lower cover latches are very difficult to operate,- due
to their placement and design. .
9. The illumination sources are not equal within 100 fL at
maximum. The left measured 3225 fL max and the right 3010 fL max.
The change in output of one side when the other is turned
completely down or up should not exceed 100 fL. This change was
measured to be 150 fL on the left side and 165 fL on the right
side.
_
10. The screws holding the pod in the optics mount do not
provide adequate force to prevent unwanted motion. -
11. There have been instances of evidence of poor quality con-
trol. a) The bearing track on the left side was not fastened
tightly. b) The plastic protector covers on the Y chain drives
dragged the chain and drive elements. c) The power cord reel
fell off of the unit. d) The tilt lock mercury switch was net
set properly.
Para. 2 - The table shall include a simple film
looping mechanism which shall allow forming a loop
of film below the-table?in-order that separated
frames, on the same roll of film, may be arranged
adjacent to each other for convenient stereo
viewing. Looping of parallel rolls of film is not
:required. This mechanism shall be capable of
forming a continuous film loop from 0 to 76 in.
Para 3.2.1.4 - All controls, including the film
hand wheels (on the manual version), shall be
positioned so they can be easily manipulated. In.
this respect, it is understood that the location
of the controls, as supplied on the preproduction
model (when accepted), will be 'satisfactory.
Para. 3.1.1.1 - The maximum levels of the two
illumination sources shall not differ by more than
100 foot lamberts at the time of this measurement,
With one of the two sources set at maximum or
minimum illumination level, there .shall not be a
change of more than 100 foot lamberts in illumim,l-
tion level of that source when theillumitation
level of the other source is adjusted through.
its full range.
Para 3.5.1 - Mounting devices shall be sufficient
rigid to preclude instrument misalignment and lo
of collimation of the optics with respect to the
viewing surface during normal handling and
operation.
Contract, Page 3, ACCEPTANCE - Final inspectien
and acceptance of articles shall be by demonstl-atr
of successful performance and completion of tests
set forth in a mutually approved Acceptance Test
Plan (ATP), which shall be provided for approval
two (2) weeks prior to. commencement of tests on
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- 2 -
Para. 11 (continued)
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Contract, Page 4, WARRANTY OF SUPPLIES -
supplies furnished under this Contract will
be free from defects in material or workmanship
and will conform with the specifications and all
other requirements of this Contract.
12. The color rendering index. (CRI), correlated color temperature Para. 3.1.1.2
(CCT), and chromaticity aim points (X, Y) were measured for each
side and are listed below.
Left Side Right Side
Test 1
Test 2
Test 1
CCT
5574
5689
5565
CRI
57.69
55.28
57.53
0.3304
0.3278
- 0.3311
0.3626
0.3616
0.3659
Test 2
5706
55.93
0.3275
0.3614
CCT
5000+500K
CRI
770
X
0.345
'Y
0.358
TE6T & EVALUATION BRANCH, ESD, TSG
3
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