OPTICAL REQUIRMENTS FOR THE ULTRA-HIGH PRECISION STEREOCOMPARATOR

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A001300010006-4
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 18
• Document Creation Date: December 28, 2016
• Document Release Date: August 29, 2012
• Sequence Number: 6
• Publication Date: April 10, 1968
• Content Type: MISC

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OPTICAL REQUIREMENTS FOR THE
ULTRA-HIGH PRECISION STEREOCOMPARATOR
STAT
4/10/68
Revised - 4/26/68
STATEMENT OF WORK
1. Scope
The subcontractor will supply and test an operating optical
system for the Stereocomparator. The system consists of
two substantially identical optical trains, one for viewing
with each eye. The system is generally described by
Drawing No. E-4650 and applicable specifications and
requirements, together with the technical reports and
communications prepared for the design contracts
2. Program Management and Control
is responsible for the timely completion of the
subcontract and for maintaining the schedule of intermediate
commitments established by the work program and the
requirements of the Statement of Work.
STAT
STAT
expects to work closely with during the J I H I T
performance of this subcontract to insure that there will
be no delay due to interfacing problems or lack of under-
standing of the overall requirements.
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herein specified to be supplied
C 0
must furnish, as part of this subcontract, all equipment,
materials, 'supplie.s, components, subassemblies, and any other
device or service required for the performance of the work and not
Furnished Materials
will furnish tothe following components and
equipment:
a) Potentiometers
b) Tachometers
c) Motors
d) Brakes
e) Slip Rings
f) Optical Bridge
g) Servo motor power supplies for optical system tests. Total of
6 units.
h) Connectors and micro-switches
In order for t to supply the proper items,
4/10/68
Revised 4/26/68
STAT
STAT
STAT
STAT
must ~STAT
specify tol the respective manufacturer's name, catalog
numbers and applicable specifications as required for the
design.
STAT
STAT
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.0
5. Acceptance Tests
The acceptance tests will be performed as described
in the test procedures, Item 6.
4/10/68
Revised 4/26/68
There will be an initial acceptance test performed at the
plant. For this purpose,uwill supply
with the optical bridge which will be used to
mount the various optical components during testing.
Note that the various optical subassemblies will be
permanently located (in a manner allowing removal and
simple relocation as required) on the optical bridge, using
hardened and ground locating pins or their equivalent in
function.
There will be a second test performed at theuplant
as part of the overall system test. This will be under
the supervision of
There will be a final test performed after installation at
the customer's site as part of the overall system test.
This will be under the supervision
STAT
STAT
STAT
STAT
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STAT
4-10-68
Revised 4/26/68
6. Test Procedures
The optical components will be tested as subassemblies and
as an overall system which includes, but is not necessarily
limited to:
a) The illumination source and condenser assemblies.
b) The objective assembly including the objective lenses,
the rotating turret and the focussing mechanism.
c) The reticle spot assembly and its individual functional
components including the light source.
d) The zoom lens assembly.
e) The anamorph assembly and its rotation system.
f) The image rotator assembly.
q) The eyepiece switching assembly.
h) The various fixed elements of the system such as beam-
splitters, mirrors, relays, field lenses, filters, etc.
Various subsidiary items such as the filter wheels,
eyepiece safety shutters, etc.
Test procedures will be prepared by
subject to review and approval
in English
Two copies of the
procedure for the first review will be supplied to uwithin
four (4) months from the start of the optical subcontract.
will require one month to perform the review.
STAT
STAT
STAT
STAT
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C)
will provide four (4) revised
4-10-68
Revised 4/26/68
One month thereafter,
copies toLI for the second review.
months to perform the review.
One month thereafter,
STAT
will require two
will provide twelve (12) revised
copies to as the final approved test procedures.
STAT
STAT
STAT
STAT
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STAT
4-i -
Revised 4/26/68
7. Drawings,
revised by
will furnish to two copies of any drawing
during the performance of the
STAT
STAT
The drawings are to be delivered tou as soon as the STAT
revision is made, in order that may be cognizant of STAT
changes as soon as they occur.
Upon the completion of the subcontract,) Will
send two prints of each drawing, plan list, or specification
STAT
STAT
Upon the completion of the subcontract,) will send STAT
the original documents or tracings of the drawings,
plan lists, specifications or source documents prepared
during the optical design contracts
and this subcontract.
STAT
STAT
STAT
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STAT
4/10./68
Revised 4/18/68
Revised 4/26/68
8. Manuals
will prepare an initial set of two (2), followed by
four (4) revised draft copies in English of operating instructions,
maintenance instructions and spare parts lists. Included will be
any requirements for special or non-American tools.
The list of recommended spare parts will include a statement
of anticipated life for each individual part.
one (1) month later.
The two (2) initial draft copies will be delivered tojwithin STAT
five (5) months after the start of the contract.
will review and return the revised or annoted initial draft
STAT
STAT
STAT
will deliver to Ithe four (4) second revised copies STAT
in English eight (8) months after the start of the contract.
7will review and return the second revised copies to
after three (3) months.
ill deliver the final revised copies in
English twelve (12) months after the start of the contract.
STAT
STAT
ESTAT
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9.. at ports
M will supply
Revised 4/26/68
AT
S
4/10/68
with monthly progress reports in STAT
English due as of the 20th day of each month, per specification
These reports will show the status of the performance of
the subcontract and will specifically point out the items
of the program deviating from the plan and the schedule.
In addition, any technical problems will be reviewed
and the appropriate corrective measures will be described
in the report.
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e v i s e 8
10. Performance Specifications
A. The performance specifications achieved by the optical system must be
fully compatible with the requirements of the ultra-high precision
stereocomparator taking into account that the least count of the measuring
system is 0. 1 micrometers. The level of optical performance actually
achieved in the assembled optical system as determined by the acceptance
tests will be the primary basis in acceptance or rejection of the optical
system. In the event that the system or any part is rejected, then
will do their best to modify the optical system to achieve the
desired results. In the event that the final performance still does not meet
the specifications and it has been demonstrated that a best effort was
STAT
a renegotiation betwee will determin"es ...
- - - -
the value of this deficiency and determine the extent of recompense due
Disagreements that could arise in application of this clause would
be submitted to expert advice
B. All equipment, components and devices in the light path or accessory
to the holding or movement of the foregoing items in the light path must
be included, installed and made operable The correction
of errors or omissions in the optical system is the responsibility of
Errors or omissions in the drawings must be rectified
These drawing errors or omissions will in no way reduce
the requirement that the optical system must perform to the specification,
and must be compatible with the requirements of the Stereocomparator.
STAT
STAT
STAT
STAT
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0 ? Revised 4/26/68
C. The minimum resolution for the system as a whole must be as follows:
THRESHOLD CONTRAST RATIO
White Light
Magnification
F = 40 mm
20X
37X
50X
100X
123X
200X
1OX
50X
61.5X
100X
Monochromatic Light
Magnification
F = 40 mm
20X
37X
123X
200X
1OX
50X
61.5X
100X
Line Pairs per mm
On Axis
1/3 of Field
Edge of Field
T
S
T
S
110
70
120
45
150
190
150
190
130
190
250
160
300
150
300
500
450
500
400
500
650
550
650
500
600
900
800
900
600
700
50
45
?50
40
45
250
230
250
105
145
330
300
330
110
150
500
450
500
275
350
110
102
102
55
150
200
190
200
170
190
670
670
670
600
600
1080
1020
1020
800
1100
54
52
52
50
50
260
240
240
140
160
330
310
330
120
160
540
500
540
400
480
a. Based on 400 field of view.
b. The line pairs set forth represent the worst case situation
either saggital or tangential.
c. Intermediate resolution figures shall be essentially
linear with respect to the referenced point.
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Revised 4/26/68
D. Brightness at the eyepiece will be 0.2 stilbs minimum when viewing
in stereo, for film densities between zero and 3.0. The minimum value
of 0.2 stilbs will be achieved by appropriate modulation and adjustment
of the light filter discs provided in the optical system.
E. The distortion shall be not more than 1% over 67% of the field of
view at all magnifications and less than 2% at the edge of the field.
F. The flatness of the image in the field of view at the eyepieces will
not be more curved than the values in the following tabulation. The
reference point for image flatness is in the center of the field of view.
40mm Objective
Center of Field
1/3 of Field L3 of Field
Edge of Field
200X
0 diopter
0.33 diopter 0.8 diopter
1.0 diopter
123X
0 diopter
0.2
diopter 0.8 diopter
1.5 diopter
65.2X
0 diopter
0.2
diopter 0.6 diopter
1.5 diopter
37X
.0 diopter
0.18 diopter 0.9 diopter
1.8 diopter
20X
0 diopter
0.2
diopter 1 .0 diopter
2 . 0 diopter
80mm Obaective
100X
0 diopter
0.5
diopter 1 .5 d iopter
3.0 d iopter
61.5X
0 diopter
0.3
diopter 1.2 diopter
2. 1 diopter
36.6X
0 diopter
0.25 diopter 0.9 diopter
2.0 diopter
18.5X
0 diopter
0.25 diopter 1.0 diopter
2.0 diopter
lOX
0 diopter
0.25 diopter 0.9 diopter
1.8 diopter
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Z. ~AT
Revised 4 26 88
G. The magnification range shall be at least
lOX to 10OX with the 80mm objective, and
20X to 20OX with the 40mm objective.
The magnification of the overall system shall be defined as the
angular subtense at the eye of the final image formed at infinity,
divided by the angular subtense of the object when placed 25 cms
from the eye.
H. The interpupillary distance will be adjustable between 50 and 75mm.
The eyepiece eye-relief will be 20 + 2mm. The sight angle of the
eyepieces will look downwards at an angle of 15? + 10 below the
horizontal.
Independent continuous adjustment of one eyepiece will be provided
over the range of ? 10 vertical.
The axes of the eyepieces must be continously adjustable at least
between 0 and 60.in a horizontal converging assembly. Eyepiece
focussing mounts will be provided for independent focussing.
I. The field stop will be apodized so that its edge is not sharp but
0
subtends an angle of 10 -0 to the operator's eye.
+ 1/2?
j. The anamorphic expansion range will be at least 1:1 to 1:2 in
any azimuth.
Y. The adjustable filter wheel for the reticle illumination system will
have a density range of 5:1 minimum. The density at the maximum
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U Q
Revised 4/26/68
filter setting will be 5.0. The function of density versus angular
position will be linear for the filter wheel.
L. The color temperature of the light source will be at least 50000 K.
M. The reticle size shall be variable over a range of at least 4 to 1.
The reticle minimum size must be approximately 1.5 times the diameter
of a diffraction limited reticle.
This results in a minimum reticle diameter of 2?m for the 40mm
objective lens. and 4N.m for the 80mm objective lens in the film plane.
N. The linear field in the focal plane of the lOX eyepiece shall be at
least 18mm in diameter corresponding to an angular field of at
least 40?.
0. The image wander of the reticle system will be less than + 1/4 of
a ? meter during operational adjustments of the reticle zoom, reticle
anamorph, reticle image rotator, etc., either individually or together.
P. The image wander will not be greater than + 1/4 of a ? meter during
the travel of + 1/32" of either objective lens during focussing.
The image wander will not be greater than + 1/2 of a ? meter
during maximum travel of either objective lens. Maximum travel
will be at least 3 mm.
During the maximum operational adjustments, either individually or
together of the Zoom, Anamorph, Image rotator, eyepiece switching,
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0 0
Revised 4/26 68
etc. , the maximum image wander will be ? 10 minutes of arc
for each eye.
Q. The position error for all positions of the mechanical drives for
the Zoom and Anamorph assemblies will not be more than + 1% for
all causes for the absolute respective indicated optical parameters.
The position error for all positions of the mechanical drive for the
image rotator will not be more than ? 1/41 for the absolute indicated
optical parameters.
R. The final image field must remain at an apparent constant brightness.
This will be done by an illumination system Zoom condenser.
The illumination value at the eyepieces will not be less than 0.025
stilb and under these conditions the operator can readily distinguish
between an optical density of 0. 1 in the range of 3.0 to 0.0.
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Revised 4/26/68
11. Deliverable Items
A. One group of subassemblies consisting of the operating
Stereocomparator optical system. This is generally
described by Drawing E-4650 and the applicable
specifications and requirements, together with the technical
reports and communications relative to the Stereocomparator
design effort. The schedule requires delivery thirteen (13)
months after receipt of order.
B. Two copies of any information data such as revised draw-
ings or plan lists or computations are to be sent
as the information becomes available.
C. Two sets of copies of the as-built drawings, specifications
and data representing the assemblies as delivered and
accepted These are to be delivered
within two (2) months after acceptance of the assemblies.
D. One set of the original tracings, drawings, specifications
or data representing the final revised as-built assemblies
delivered and accepted These are to be delivered
within two months after acceptance of the assemblies.
E. Two copies of the test procedures in English for first
STAT
STAT
STAT
STAT
are to be delivered I I within four (4) STAT
months from the start of the subcontract.
F. Four copies of the revised test procedures in English for
the second review are to be delivered within STATT
six (6) months from the start of the subcontract.
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4/10/68
Revised 4/26/68
G. Twelve copies of the final revised test procedures in
English are to be delivered within eleven months STAT
from the start of the subcontract.
H. Two copies of the test and inspection records of the
performance tests made
to qualify the
assemblies for delivery and acceptance) I These
are to be delivered
tests .
at the time of performing the
STAT
STAT
STAT
STAT
I. representatives may elect to be present during all
or part of the performance testing and/or qualification
must notify thirty (30) days STAT
prior to the initial date of testing.
J. Two copies of the Operating Instruction manuals in
English for first reviewF--]These are to be
STAT
delivered L- vithin five (5) months from the start STAT
of the subcontract.
K. Four copies of the revised Operating Instruction manuals
in English for second revie~
delivered within eight (8) months from the start
of the subcontract.
L. Twelve copies of the final revised Operating Instruction
manuals in English. These are to be delivered
within twelve (12) months from the start of the subcontract.
M. Two copies of the Maintenance Instruction manuals in
STAT
STAT
STAT
English for first revie These are to be delivered STAT
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4/10/68
Revised 4/26/68
within five (5) months from the start of the
subcontract.
N. Four copies of the revised Maintenance Instruction manuals
in English for second review0 These are to be
deliveredF-~ ithin eight (8) months from the start
of the subcontract.
0. Twelve copies of the final revised Maintenance Instruction
manuals in English. These are to be delivered
within twelve (12) months from the start of the subcontract.
P. Two copies of the List of Recommended Spare Parts in
English for first review These are to be delivered
within five (5) months from the start of the subcontract.
The list is primarily based on the requirements to maintain
operation of the Stereocomparator for a period of one year.
However, if there are parts whose replacement could be
expected at a longer interval than one year, then they should
be included and so indicated. The estimated life of each
recommended spare part must be shown.
Q. Four copies of the revised List of Recommended Spare
Parts in English for second review These are to
be delivered within eight (8) months from the start
of the subcontract.
R. Twelve copies of the final revised List of Recommended
Spare Parts in English. These are to be delivered
STAT
STAT
STAT
STAT
STAT
STAT
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Revised 4/26/68
4/10/68
within twelve (12) months from the start of
the subcontract.
S. Seven copies of the monthly financial and technical
reports in English per specification No. DB-1001 .
The reports are due on the 20th day of each month, and
should represent the status of the work as of the last
day of the preceding month.
T. must deliver all alignment Targets,
Resolution Targets, and Target film, etc. , generated
for use in testing the optical system or
components of the Stereocomparator. The delivery of
this material must coincide with the delivery of the
optical system subassemblies.
U. must send td
all deliverable items due under
This is to be done as the material becomes available,
or upon completion of the work represented by this
specification.
STAT
STAT
STAT
STAT
STAT
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