Accession Number:

AD0689233

Title:

OPTICAL ABSORPTION METER.

Descriptive Note:

Final rept. 28 Jun 68-1 Apr 69,

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s):

• Gilbert,G. D.
• Honey,R. C.
• Meyers,R. E.
• Sorenson,G. P.

Report Date:

1969-04-01

Pagination or Media Count:

64.0

Abstract:

The report describes the second-generation absorption meter a-meter. The system uses two self-powered pulsed light sources and two detectors. One source is equidistant from the two detectors and provides an in-situ calibration method. The other source is located about one-third as far from one detector as from the other detector. The detectors and light sources operate at ambient pressure, in contact with the water. Fifty-ohm coaxial line is used to transmit the signals to the deck. A solid-state circuit on deck provides measured values of a the absorption coefficient directly on a digital voltmeter. A signal is also provided with which to drive a chart recorder. Author

Descriptors:

• *SEA WATER
• *MEASURING INSTRUMENTS
• LIGHT TRANSMISSION
• OPTICAL EQUIPMENT
• ABSORPTION
• BACKSCATTERING
• DIFFRACTION
• PULSES
• DETECTORS
• CIRCUITS
• PHOTODIODES
• DIGITAL SYSTEMS
• RECORDING SYSTEMS
• ACCURACY
• MATHEMATICAL MODELS

Subject Categories:

• Test Facilities, Equipment and Methods
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE