JPRS ID: 8415 TRANSLATIONS ON USSR SCIENCES AND TECHNOLOGY PHYSICAL SCIENCES AND TECHNOLOGY

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• Document Page Count: 73
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TRANSLATIONS ON USSR SCIENCE AND TECHNOLOGY ~ -
PHYSICAL SCIENCES AND TECHNOL~GY
(FOUO 23/79)
U. S. JOINT PUBLICATI~NS RESEARCH SEt~VICE
~
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JPRS L/8415
23 April 1979
TRANSLATIONS ON USSR SCIENCE AND TECHNOLOGY
_ PNYS I CAL SC I ENCES APLJ. TECHNOLOGY
(FOUO 23/79)
CONTENTS PAGE
~rsres
_ The Influence of Optical 8yetem Abe:ratior~s on the Ma,in
Psrameters of a Thermal Scanning Viewer
(B. V. Ukhov, et al; OPrIKO-N~QiARIC~'sSKAYA .
~"[~Vl'i1~LL.1Gir,\~Si ~ ~ 1\0 l~~ ~97v, � ~ ~ ~ ~ ~ ~ s ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 0 1,
An Analysis of the MBtrN.ogical Capability of a Coherent
Optical Method of Monitoring the Shape of Complex
Surfaces -
(V. A. Kudrye~yteev, V. 3. Shapov; OPTIKO-
MEI~ANIC~sKAYA PROMYSffi~ENNOST~, No 11, 1978) ~ 7
Results and Develop~nental Prospecta in Optical Ceramica
(F. K. Volynets; OPrII{0_~~~,ggqyp ~
PRO~lYSffi~Il~10ST~, Ro 11, 1978) 14
The Basic Principles of the Automation of the Process
oP Shaping Astronomice~l. Ogtics
(A. M. Prokhorov, et al.; OPTIKp_MEHIiANIC~~py,A
PROI~sffi~ENNOST~, No 11, 1978) 22
The Selection oP the CuuditiQna Por the Machi;ning of
- Large Ogtical Components
(A. P. Bogdanov, et a1.; OPTII{0-MEI~'ArTIC~3KAyp
~tol~s~xxOSr~, No ~1., ~9?8) 30
Cast Componente of Sugerinvar for Optical Instruments .
(3. V. Rabinovich, ~t a~.; OPTIKO-MEKHA,NIC~SKpyp
PROI~fS~ENN06T', No 11, 1978) 38
The Statistical Characteristics of Opticsl Radiation
Attenuation in the Ground Le~yer of the Atmoephere
(Sp~ing, Autumn) .
(V. L. Filippov, et al.; OPTIKO-N~IG'~gKAyp
PROI~sffi,~1NOST~, No 11, 1q78) 43
- a- [III - USSR - 23 S& T FOVOJ
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CONTENTS ( Continued) ~ p~,ge -
A F1~a~ Sca.nniug Viewer P~r Quality Control. in the 4
Asgembly oP ~he Stators of E1.ectrical Nkchinea
(M. M. Miroehnikov, et a1..; OPTIKO- _
N~ADiIC~SKAYA PftOMStSffi~ENNOST' , No ~l, 1978) 50
PUBLICATZ(~18 -
Transfer oP Electron-ExcitQtion B~ergy in Condensed
N1~di8
~ (V. M. Agranovi~ch, M. D. Ge~l.anin; PII3ENOS
- n~~ii ~aoNrroao vozBt~z~nQnca v
KoxnnQSnzoVANrr~ s~, i978) 54
-b-
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PIiYSTC?"~
. UDC 621.384.326
THE INFLUENCE dF OPTICAL SYSTEM ABERRATIONS ON THE MAIN PARAMETERS OF A
THERMAL SCANNING VIEWER
Leningrad OPTIKO-MEKHANICHESKAYA PROMYSHLENNOST' in P.uasian No 11, 1978 ~
pp 3-5
[Article by B.V. Ukhov, V.G. Klochkova, D.N. Krasnikov and S.M. Benza,
manuscript received 16 Nov 77]
- (Text] Queatiana related to the influence of the aberratione
of the optical systE:m of a thermal vieWer on the angular
resolving power and the signal to noise ratio are treaCed.
Quantitative resulta are derived for various valuea of the -
time constant of the photodetector.
We shall assume that the thermal viewer observes an ob~ect which takes the
form of two infin~.tely long etrips, perpendicular to the direction of the
line scanning. The width of these stripa and the spacing between them cor-
responds to the instantaneous viewing angle of the thenaal viewer, which we
shall aesume to be equal with respect to the line and frame. Let the x -
axis coincide with the direction of the line by line scanning, while the y
axis corresponds to the frame scanning direction. We shall attempt to take
into account the influence of the dimensions of the effective circle of con-
fusion of the optical syatem on the .waveform of the amplifier output signal
and the basic parameters of the equipment.
In a real optical system, aberrationa and diffraction scattering ~1] wash
out the images, where this blurring can be characterized by a scattering
_ function h(x, y, x', y'). According to the literature [1], the dietribution
of the irradiance E(x, y) in the image plane of the optical syatem for the -
case of an irradiance E1(x', y') in the ob~ective field is determined by
meana of the convolution integral:
~ ~
e~x, y~ - j j F~ c~'~ h(x. y, x'. y'~ dM~.
We shall approximate the scattering function with the gausaian function, some-
thing which is ~u~stified with a sufficient degree of precieion for many actual
optical aystems:
~ (X� r� y~) ' 2s ~ .
i' (cX-.~'r~ tr -y'rl � .
1
~ntt nr~*~T ~ T ncu n~n v
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_ In Chis case, the distribuCion of ehe irradiance, corret~n~~nding to the ob~ect -
in the farm of one strtp, wi11 be defined by the expreseion:
E(x,Y) Y: B u~1 Q- ~''t(.r-x~1~~Ffy-y'?~I
Zs f f X
~ -
_ _o~
Xdt'd,r~~-~I~~elY~x? 2)~~~~i f �~~,r~ l/~~' -
~ I
i e~
(s) ' ~ " `e~ ~ da -
- where ~(z) a 1~~~ o is the probability inCegral; B is
a conatant; a ia the size of the area of the photodetector.
The sensiCive element of the photodetector observes the image by virCue of
moving the latter along the x axis. This means the change in the irradiance
- of the receiver area E(x, t) with respect to time has the form [1]:
E(x,!)..~(x-ut)~'~~~D f Y(x-vt-~- 1~1_
L 1 .l
IT(x-vt- 2)J~,
~
where v is the rate of travel of the image with respect to the r~ceiver
area.
The signal level at the output of an inertialess photodetector with uniform
, sensitivity E over the area is: _
o a
3 3 r
-