(Sanitized) 552 MDRI PRODUCT IMPROVEMENT UTILIZING(Sanitized)OPTISYN ENCODERS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A003000020028-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 13
• Document Creation Date: December 28, 2016
• Document Release Date: May 6, 2003
• Sequence Number: 28
• Publication Date: March 27, 1964
• Content Type: REQ

Approved For Release,,3003/05/15: CIA-RDP78BO4741AO0300WO028-7
increase capabiii t y .%nd. f i t.=r of present 552
Stereo Viewer by modifying t a w to ir;r.' U'10 ic digital
cuMparator features,
Declass Review by NIMA / DoD
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Approved For Release 2003/05/15 : CIA-RDP78BO4747AO03000020028-7
 Approved For Release 2003/05/15 : CIA-RDP78B04747A003000020028-7
GENERAL
employing
The 552 Point Marking System will be modified to have
Automatic Comparator-Mensuration capability. 'A measurement system
OPTISYN
encoders with
Solid State counters, shielded ca les of proper length,
displays and readout-record provisions will be supplied by the
customer for installation
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Automatic X-Y coordinate measurements of photo points
Four (4) incremental photo optical type encoders, manu-
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will be employed. Each will provide
0 2,500 counts per revolution, or a one (1) micron bit size with an
It. expected accuracy count ol; + 1/4 micron, (according to manufacturer).
Declass Review by NIMA / DoD
M
will be supplied by customer for installation on the control
data printout recording on demand. Any extra data entry switches
are obtained through encoders attached to precision lead screws.
supplied Panel Controls will permit zero reset, STAT
panel.
drunkenness over 2 1/2mm is expected to be better than 1/2 micron.
Precision ground ball lead screws 2 1/2mm pitch; one
(1) micron per inch maximum lead error, five (5) microns per foot
accumulative lead error, Maximum lead error including thread
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 Approved For Release 2003/05/15 : CIA-RDP78BO4747AO03000020028-7
I
LIFE BX_PECTArN'QY OF 'ENCODERS
The manufacturer's expected average mean time to failure
of this optical type encoder is six (6) years and is dependent
a upon the life of the lamps and precision Ball Bearings, This
lv exceeds the maintenance free life expectancy of Brush
type encoders.
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a
Approved For Release 2003/05/15
CIA-RDP78?04747A003000020028-7
NOTE: The size of these encoders, approximately 2 3
diameter by 2 1/4 inch length, will also require
modification of the systems' X and Y carriage
and base castings as explained in the Work
Statement below, In addition,: the standard
encoder connector must be'replaced by a potted
pig tail arrangement jto' avoid .lateral inter-
ferences. a f
READOUT, LOGIC AND DISPLAYS
To be supplied by customer, will contain six (6) digit
th`least significant count representing a one (1) micron bit.
Customer will provide shielded cables of a length specified by
counters, registers, and visual displays with.provisions for re-
cording measured data and extra identification data on printout
equipment. Each axis will have a six (6) digit numerical display,
1. 7
connectors and closures to house these components.
NOTE: A count rate capacity of approximately 25kc is
required. Also, zero reset switches should be
provided for each axis on. the individual counter
display panels.
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 Approved For Release 2003/05/15 : CIA-RDP78BO4747AO03000020028-7
1
ill provide ON-OFF power swi'tc'h, data
readout and zero reset switch at the operator's control panel.
,Power 110/120 volts A.C, 60 cycles. customer to supply cables
from equipment to readout and counters.
SYSTEM PE'RFORMANCL
Digit bit size - one (1.) micron.
~~axiau:n speed 1/2 inch to 3/4 inch per second,_ aPProxmatelg~.
ACCURACY.
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design .objective is to provide the 552
.System with a repeatability of one (1) micron and an average
measurement accuracy o ,pprox aately one (1) micron over short
?1istanc :s. Lt,n3 1 Stance ;nc-asurQ:jent g:sal is to provi,le an ac-
curacy oetter trka' ; 1/2 micron- plus ,) (`i stance travelled,
ILLEGIB
On the basis.of an accuracy analysis included below,
believes`'the following accuracies cah be achievod STAT
Specified System Total Accuracy:
mici ns or + 1.1,/4 microns up t
millimeter.
4
microns or 4 1 3/4 ,.ricr-)ns up to
2u millimeters.
System o\ccuracy: ?. 1/2 microns + .005,
over distance travelled.
Approved For Release 2003/05/15 : CIA-RDP78B04747A003000020028-7
Overall system repeatability within 1 3/4 microns.
 Approved For Release 2003/05/15 : CIA-RDP78BO4747AO03000020028-7
We are confident that the. basic design of the S ereo
viewer has sufficient rigidity to provide these, or greater,
system accuracies.
Iaowever, because the magnitude of the problem requires
advancing the state of the art in large format stereo viewers,
there is a high risk ii .etermining what the final accuracy will
be. The exact results will not be known until the system is being
Ltested.
The best possible' engineering and practices are being
same type lea,.. screw as is used on the viewer to an accuracy of
W applied, For example, has made the
l/4m. Obbta.in.ing a guarantee to this is impossible.
Approved For Release 2003/05/15: CIA-RDP78BO4747AO03000020028-7
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ACC(JI?ACY ANALYSIS
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LEAD _) C LWS IAND P TU'rSa
2 1/21nin pitch accuracy specified as .000040 maximum
lead error p&'r inch, but r,?)t to exceed .0002 inch per foot of
ball thread cumulative.
According to tests conducted by the manufacturer,
a total deviation .000040 inch per STAT
inch is practical
nr)rcally surpassed in order for the
%.?,manufacturc r to qu:. fy the overall tolerances, Actually,
has verified accuracies better than these
specified above :or siriiiar
PALL, 3U. I I ai;_;
These contain class 1 balls and are loaded to eliminate
play_ system effects due to eccentricity in the balls are ex-
pected to be lower than 5-10 millionths.
S>T"RAJGFI-TF E3: OF JAY:
. The rod ways are obtained with an initial straightness
of .0002 inch per foot. These will be further straightened by
aad justraent every six (611) inches across its . length.
=straightness is expected to be better than 0000:0 inch
per ie c:ih. 'ineriatic: design reduces this figure by a factor of
two (2' , [ .-,_ ticity of final machined members has been predicted.
Ai being less. However, the aggregate elasticity of final system
will not be known until completion.
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HYSTERESIS AND DI;FLBCTION DUE TO VARIOUS FORCES F1 I FIBER OPTIC
Ci113I..13.y1 OPTICAL TURRETS, SCIREWS, CARRIAGES AND Wi'\YS
Special efforts in Kinematic design have been made to
provide low torque-flexible fiber optic cable coverings, rigidized
meehanite castings, shortened lever arms and low hysteresis com-
ponents as in house product improvements over previous designs.
It is, therefore, estimated that approximatelA 1 1/2 microns will
be contributed by these factors.
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R11PEATABILITY
Ball Screws
The repeatability of the.ball screws inaccord.ance
with these tests conducted by
order of 10-20 millionths.
should be in the STAT
Ball Bushings
The effects of eccentricity and accuracy of the
halls is 5.-10 millionths. Hence, repeatability error due to the
ball bushings is not expected to exceed 1/4 micron.
Hysteresis and Deflection Due to Various Forces on the
Carriages
The repeatability error due to hysteresis and
Ott r effects is expected to be approximately one (1) micron.
l ?a_ TOTAL ACCURACY PSLATIVB TO DISTANCE TRf1Vi LLLD
U -lmm; microns, or +
1 1/4 microns
20mm: 3 1/2 microns, or + 1 3/4 microns
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 Approved For Release 2003/05/15 : CIA-RDP78BO4747AO03000020028-7
552 YSTI M REPEATABILITY
within 1 3/4 microns.
NOTR: The above system accuracy and repeatability does
not inciwle the accuracy cif the digital readout
system. alowever, it does include any error due
to connection between: the output shaft and the
digitizer. If the Cii''i:IS;'rtir Encoder is used, then
an additional -+ 1/4 counts error is added, as
specified
a measure of the individual operator's repeatability.
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Approved For Release 2003/05/15 CIA-RDP78B04747AO03000020028-7
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PROPOSED MR SHOD OF
ACCUIZACY CHECK
CHECKING ACCURACY AND REPEATABILITY
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To check the system accuracy will employ STAT
a raster I inear stern-'ar-1, curt i t i d by the Na tional ureaun o
tandarrls, to.be calibrated within one (1) micron. An average of
five (5) readings taken from one direction only will be recorded
for each point on this calibrated grid to determine linear measure-
ment accuracies. Grid was calibrated at 68 degrees F. If the
m eratures
ast is made at other temperatures
Awli
installed.
REPEA'AiPILITY
To check for repeatabbility, a reticle line, star image,
or scale will be p:"ac