(Sanitized)QUARTERLY STATUS REPORT NO. 6 DEC. 31, 1965 - MARCH 31, 1966

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001500060001-0
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: September 26, 2005
• Sequence Number: 1
• Content Type: PERRPT

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Quarterly Status Report No. 6
Dec. 31, 1965 - . March 31, 1966
ASP}l8RIC OPTICAL SYS
STAT
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Abstract
During this period we have concentrated on the design
problem in aspheric optical systems. Most of our effort
has gone into learning how to use large computers at a re-
mote location. Our studies so far have convinced us that
large computers are needed to cope with the problem of
optimum design with the full exploitation of aspheric sur-
faces. We havm procedures fairly well worked out for using
an 1. B.M. 7044 at
and an T.B.M. 7094 at the White Sands Missile Range. We
are now returning to detailed lens studies of lenses with
aspheric surfaces.
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Detail of Research during this period.
A. The Aspheric Triplet Design
An aspheric triplet design was described in the previous
report. A brief review of this problem is the following:
1) An all spherical triplet and an aspheric triplet
were designed on ORDEALS. The specifications were published
in the proceedings of the ICO Conference in Tokyo, This
study showed insignificant gain in using four aspherics,,
We were not confident, however, that we had designed a true
optimism aspheric design. The aspheric design was done on
the ORDEALS program which is a semiautomatic program. We
believe that the aspheric design problem over extended this
program.
2) We redesigned the aspheric lens on the program
using the I.B.M. 7094 at White Sands. The first few .atteVts
appeared to be encouraging. This new aspheric design was
described in our previous progress report and in a paper
presented to a meeting of S.P.I.B. at El Paso, Texas. The
I
different from what we had done on the ORDEALS program.
program succeeded in balancing out large high order
aberrations. We designed our triplet on the philosophy of
trying to find solutions with small high order aberrations.
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program designed the aspheric coefficients completely
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The result is that the
program provided remarkably flat
aberration curves, but they are badly rippled. We have since
then computed the Strehl definition for the 0 design and
this shows that the rippling has disastrous effects. The
Strehl definition in the axial image was only 0.31.
Summary of Triplet Study
The triplet study has, we believe, shown that opts zing
aaspheric lenses is far more difficult than we anticipated.
STAT
The large automatic design program of 0 turns out designs STAT
quite different from the one designed on ORDEALS. At the
moment it is difficult to say that it turns out better lenses
but it appears to offer much more potential. We can not
prove definitely our point but we believe the triplet study
is showing that for t i prob em the use of four asphe-Le
surfaces is not worthwhile. The slight Improvement we gain
is not worth the extra cost of the &spherics. Before dis-
missing the problem we should Introduce one aspherie into
the triplet. If we could achieve the improvement so far
shown with one aspheric then it might be a practical advan-
tage. We plan to do this to complete the triplet study.
B. The Helier Study
In the I.C.O. paper we also presented an optimized
Heliar lens which was designed on O ?EALS. Since that time
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"3..
we have made several new designs on ORDE 1 S,. FLAIR ofd the
0
program. These designs. were described at the S.P.I.L.
meeting in El Paso. We now believe we have a truly opti-
mized Heliar design. We plan to use N AIR to design a Heliar
with aspherics. This time we are going to first introduce
a single aspheric.
C. The F/3.5 Triplet.
The triplet described in our previous report was an
F/6., 24 inch focal length lens to cover a 911 x 911 format.
In the I.C.O. paper we warned that one can not conclude that
aspherics are of little help in all lens problems. For
ale, we believe that aspherics will more clearly im-
prove a faster narrow field triplet. We have therefore
started the design of an all spherical f/3.5 triplet with a
24" focal length covering a 51t x 5" format.
D. The Lens Design Programs.
In order to use large machines we have had to make a
major programming effort. We have taken two routes.
1) We have attempted to use the program on the STAT
White Sands 7094, through the use of mail service. This has
been extremely slow and frustrating. A card-to-card data
link has been ordered, and should be installed by May 1, 1966.
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2) Many changes have been introduced into FLAIR. This
is a program which can be run on.:a 7044 or a 7094. We are
testing it out on a machine at the
We have STAT
had to add many decision making features in order to make
up for the fact that we can get only one run a day.
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