Abstract

At about 195°K, PbSe detectors have a much higher detectivity in the 3.5-μ to 5.2-μ wavelength region than any other type of infrared detector. Detectors with a D* (4.4 μ, 2500 cps) greater than 3 × 10¹⁰ cm (cps)^½/W are standard. These detectors are partially background limited at 195°K and can be improved to at least 6 × 10¹⁰ cm (cps)^½/W by appropriate radiation shielding. When used at room temperature (295°K), these films exhibit peak detectivity at about 3.8 μ and about one-half detectivity at 4.4 μ. Although the absolute magnitude of the peak detectivity at 295°K is considerably less than that at 195°K, it is better than a thermal detector, such as a bolometer or thermocouple. In addition, the time constant at 295°K is less than 2 μsec.

© 1965 Optical Society of America

Lead Selenide Detectors for Ambient Temperature Operation

T. H. Johnson, H. T. Cozine, and B. N. McLean
Appl. Opt. 4(6) 693-696 (1965)

Extrinsic Detectors

Henry Levinstein
Appl. Opt. 4(6) 639-647 (1965)

Optimum Utilization of Lead Sulfide Infrared Detectors under Diverse Operating Conditions

James N. Humphrey
Appl. Opt. 4(6) 665-675 (1965)

Detectors for Ultraviolet, Visible, and Infrared Radiation

R. A. Smith
Appl. Opt. 4(6) 631-638 (1965)

Photoconductive Indium Antimonide Detectors

F. D. Morten and R. E. J. King
Appl. Opt. 4(6) 659-663 (1965)