PROPOSAL FOR FOCUS CAM RETROFIT TO ACCOMMODATE DELTA 6000 SERIES PHOTOGRAPHY

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A003200010025-6
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 11
• Document Creation Date: December 28, 2016
• Document Release Date: June 26, 2002
• Sequence Number: 25
• Content Type: REQ

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TOP SECRET
SHC65-9217-345
COPY .5 OF 15
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Proposal for Focus Cam Retrofit for the Gamma I Rectifier
to Accommodate Delta 6000 Series Photography
1. Introduction
proposes a retrofit program in order to provide the Gamma I
rectifier with a capability to handle both KH-4 and Delta 6000 series
material.
Upon delivery and initial operational utilization of the first Gamma I
rectifiers, it appeared desirable to be able to handle 6000 series panoramic
material with the same resolution and geometric fidelity as is specified
for the rectification of KH-4 photography. While the same resolution can
be achieved during rectification of 6000 series material, the difference
between the earth curvature set into the easel to achieve sharp focus and
the easel curvature which is correct for the nominal aircraft altitude
results in a displacement of image detail, i.e'. a positional error in the
rectified image. The magnitudes involved are shown in Figure 1. The
proposed retrofit cam would correct this deficiency.
To accomplish the desired objectives, it will be necessary to:
a. Modify the easel adjustment range to accommodate the
shift towards a greater radius.
b. Calibrate cam surfaces to allow sharp focus at the new
easel positions.
c. Modify the existing three-dimensional cam to accept the
new cam.
d. Calculate and fabricate an additional slide rule to
accommodate the desired operational range.
Declass Review by
NIMA/DOD
TOP SECRET
ApproveaS eei AOF/08/06 r GA tYr 012
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 Approved 6rFR ea J 10)NP8/06 :H
TOP SECRET
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Ii. Easel Modification
g47FM99200010025-6
The change In easel curvature towards a plane of infinite radius will neces-
sitate the replacement of the dial Indicators at the extreme ends of the
easel. The existing indicator covers a range of 1.000 inch maximum displace-
ment and it will be necessary to replace this Indicator with one that will
provide a greater range. This replacement will thereby dictate the replace-
ment of the indicator mount due to the different physical arrangement of
the Indicator. Replacement of the yoke and lead screw and the tension
springs will also be accomplished.
III. Focus Cam
The calibration phase for the focus cam must occur after the easel modifica-
tion has been accomplished. During this phase, the equipment will be set
to the proper conditions and static photographic tests will enable the
plotting of a curve that will define the focus cam profile. The theoretical
data which have been computed, combined with past experience on the focus
4cam, lead us to believe that the desired range can be satisfied by the
fabrication of two cam profiles.
? We intend to modify the existing three dimensional cam to accept the two
new profiles.
IV. Slide Rule
The existing slide rule does not provide data for the contemplated lower
range of altitude. This necessitates the calculation and fabrication of a
new slide rule.
V. Schedule
Refer to accompanying bares chart.
VI. Cost
The fixed price for the focus cam retrofit is
please refer to the attached breakdown.
per unit. For details
?
TOP SECRET
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Approved For Release 2002/08/06 : CIA-RDP78BO4747AO03200010025-6
 -Approved $r EE J IO, 8/06 :tgI_~ML47MqS200010025-6
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TOP SECRET
SHC65-9217-345
COPY 6 OF /.3'
Proposal for Focus Cam Retrofit for the Gamma I Rectifier
to Accommodate Delta 6000 Series Photography
25X1
?
1. Introduction
proposes a retrofit program In order to provide the Gamma I
rectifJer with a capability to handle both KH-4 and Delta 6000 series
material.
Upon delivery and initial operational utilization of the first Gamma I
rectifiers, it appeared desirable to be able to handle 6000 series panoramic
material with the same resolution and geometric fidelity as is specified
for the rectification of KH-4 photography. While the same resolution can
be achieved during rectification of 6000 series material, the difference
between the earth curvature set into the easel to achieve sharp focus and
the easel curvature which is correct for the nominal aircraft altitude
results In a displacement of Image detail, i.e. a positional error In the
rectified image. The magnitudes involved are shown in Figure 1. The
proposed retrofit cam would correct this deficiency.
To accomplish the desired objectives, it will be necessary to:
a. Modify the easel adjustment range to accommodate the
shift towards a greater radius.
b. Calibrate cam surfaces to allow sharp focus at the new
easel positions.
c. Modify the existing three-dimensional cam to accept the
new cam.
d. Calculate and fabricate an additional slide rule to
accommodate the desired operational range.
?
25X1
25X1
TOP SECRET
Approvedc ee12Q01/08/06
 Approved 5r ao 4A1'8/06 :
Ii. Easel Modification
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The change in easel curvature towards a plane of infinite radius will neces-
sitate the replacement of the dial Indicators at the extreme ends of the
easel. The existing indicator covers a range of 1.000 inch maximum displace-
ment and it will be necessary to replace this indicator with one that will
provide a greater range. This replacement will thereby dictate the replace-
ment of the indicator mount due to the different physical arrangement of
the indicator. Replacement of the yoke and lead screw and the tension
springs will also be accomplished.
III. Focus Cam
The calibration phase for the focus cam must occur after the easel modifica-
tion has been accomplished. During this phase, the equipment will be set
to the proper114conditions and static photographic tests will enable the
plotting of a curve that will define the focus cam profile. The theoretical
data which have been computed, combined with past experience on the focus
cam, lead us to believe that the desired range can be satisfied by the
fabrication of two cam profiles.
We intend to modify the existing three dimensional cam to accept the two
new profiles.
IV. Slide Rule
The existing slide rule does not provide data for the contemplated lower
range of altitude. This necessitates the calculation and fabrication of a
new slide rule.
V. Schedule
Refer to accompanying bar chart.
Vi. Cost
The fixed price for the focus cam retrofit is
please refer to the attached breakdown.
per unit. For details 25X1
25X1
TOP SECRET
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