DEVELOPMENT OBJECTIVES ADVANCED STEREO RHOMBOID PROTOTYPE MODEL II

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A000700010036-6
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: November 2, 2004
• Sequence Number: 36
• Publication Date: December 5, 1966
• Content Type: REQ

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5 December 1966
DEVELOPMENT OBJECTIVES
ADVANCED STEREO RHOMBOID PROTOTYPE MODEL II
2. CONCEPT. A Model I advanced rhomboid has been developed and is
currently in production; however, its usefulness is somewhat limited
by its external configuration, which restricts the range of motion of
the objective lenses. This development is to eliminate that restriction
and incorporate advanced features directed toward expanding the basic
concept and creating a more versatile design.
3. REQUIREMENTS.
cope into a high-power microstereoscope.
Declass Review by NGA.
1.' INTRODUCTION. These Development Objectives describe the require-
ments to be met in the design and fabrication of a Model II Advanced
Stereo Rhomboid Prototype for converting thel Zoom 70
Stereomicros
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3.1. Configuration. The rhomboid must fit on any
Zoom 70 Stereomicroscope that has been modified to take rhomboids fitted
with a dovetail slide--presently used to replace the older clip-on
version. The external configuration must allow 90? rotation of the
Zoom 70 power pod in either direction within its support ring.
3.2. Image Separation. The separation between the optical axes
of the two objective lenses must be adjustable. In the "X" direction
(parallel to viewer's eye base), the maximum separation must be no
less than e14 ins chimes and the minimum separation no more than 2.-inch-u-, .
In the "Y" direction (perpendicular to the eyebase), a maximum separation
of at least 10 inches in Y is required. Care must be exercised that
these large separations are obtained with a minimum addition of
bulk; i.e., the units must be as compact as possible when not used at
their maximum separation. A telescoping (collimated) system or
equivalent alternative should be considered.
3.3. Objective Magnification. Interchangeable sets of objective
lenses shall be supplied to provide 1 2X, and .IX objective magnifi-
cation. These objectives must be parfocal and should be designed for
quick attachment and removal.
3.4. Monosco is Viewin . The reflecting prism of the rhomboid
attachment mus De mounted so that it can be easily removed from the
optical path to permit the Zoom 70 to be used as a stereomicroscope
without the rhomboid attachment being removed; however, the field of
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STAT
view of the basic Zoom 70 must not be compromised. It is not mandatory
for the instrument to remain in focus when changing from monoscopic
to stereoscopic viewing, but a set of monoscopic objectives, equivalent
in performance and magnification to the stereoscopic objectives,.'must
be provided. These objectives must also be designed for rapid"attach-
3.5? Image Rotation. Independent,-360_ optical image rotation
shall be provided in each separate optical path. of the rhomboids.
The proposal should state: (1) the type of image rotation element
contemplated, (2) the error in optical centering that will occur in
one total 360? rotation, and (3) the manner in which this error will
be measured.
3.6. Resolution. Mounted on a Zoom 70, using the standard lOX
eyepieces, and at 3X zoom setting, the attachment must provide the
following resolution:
a. 3X objective = 400 lines mm
b. 2X objective = 300 lines/mm
c. 1X objective = 150 lines/mm
3.7. Field of View. The rhomboid attachment must not restrict
the field of view of the basic Zoom 70 at any magnification value. +V9Gl;=,?
With the 1X objective, the field of view shall be the same as the
values listed on page 10 of Q Catalog , 53-70-01-01, with proportional
limits for the 2X and 3X objectives.
3.8. Focusing. The left optical path of the rhomboid must
incorporate an individual focus adjustment.
3.9. Optical Performance. The optical performance (aberrations)
of the rhomboid must not degrade'the normal performance of the Zoom 70.
The optical system must be designed to permit maximum total light
efficiency. The proposal must'state the predicted efficiency at all
magnifications and describe the system by which this efficiency will
be measured.
3.10. Miscellaneous.
3.10.1. Construction. This instrument shall meet the
highest commercial standards of microscope construction.
3.10.2. Production. The proposal must include an estimate.
of production costs for an additional 100 units (in increments
of 25). Manufacturing drawings to commercial standards and
with sufficient detail to permit quantity production by any
competent manufacturer must be supplied with the prototype.
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3.10.3. Carrying Case. The proposal must include cost for
supplying a carrying case for the instrument.
3.10.4. Instruction Manual. An instruction manual. describing
proper installation and use of the rhomboids shall be provided.
This manual shall conform to the requirements listed in Specifi-
cation No. DB-1003.
3.10.5. Documentation. Contractual documentation, which
conforms to the requirements listed in Specification No. DB-1001,
shall be provided.
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