TM 11-6625-3081-23
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DESCRIPTION OF DAYSIDE TEST BENCH 2A1 (cont)
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h.
LASER POWER METER 2A1A7
The laser power meter 2A1A7 (EG & G Electro-Optics model 460-1) is part of the
model 460 laser power meter portable system used to test the TADS dayside assembly
(UUT).
Its front panel controls include a power ON/OFF pushbutton switch, a four-
digit number display, a six-position (full-scale) multiplier selector dial, and an
automatic wavelength indicator (rated in amperes).
The purpose of the laser power
meter is to measure the output of the laser tracker unit and laser transceiver
(UUTS).
Characteristics
Parameters
Range:
10-3 thru 10-8
Readout Accuracy:
1% +1 count
Response Time:
Almost instantaneous
Analog/Recorder Output: O thru 1,999 volts
Physical Dimensions:
Depth
7.50 in
Width
8.25 in
Height 3.00 in
Weight 4 lb
Electrical Input: 115v, 60 Hz
Power Usage: 4 watts
i.
RADIOMETER HEAD 2A1A8
The radiometer head (EG & G Electro-Optics model 460-2 Silicon Detector Head) is
also part of the model 460 laser power meter portable system.
A silicon
photovoltaic detector is located inside the radiometer head, and when in use scans
the laser or photodiode output.
A multipin connector mates with a system interface
cable assembly that connects to the power meter.
A protective cover for the open-
cavity area leading to the detector is installed anytime the unit is not in use. A
six-position, rotary switch and a connector are on the rear of the unit.
The switch
positions are:
Position
Measured Wavelength
Used For
1
441.6 nm
Helium - Cadmium Laser
2
448.0 nm
Argon Laser
3
514.5 nm
Argon Laser
4
632.8 nm
Helium - Neon Laser
5
904.0 nm
Gallium Arsenide Laser
6
200 to 1100 nm
Direct photocurrent measurement
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