Infrared-transmissive lens and human body detecting sensor using

Details Infrared-transmissive lens and human body detecting sensor using Infrared-transmissive lens and human body detecting sensor using

1992-05-14

1994-05-24

Lerner, Martin

Optical: systems and elements

Having significant infrared or ultraviolet property

Lens, lens system or component

2503381, 2503383, 250353, 359356, G02B 102, G02B 1314, G01J 500

Patent

active

053154347

ABSTRACT:
An infrared-transmissive lens formed by using glass including germanium and selenium or germanium and sulfur as main components and a human body detecting device including the lens and a pyroelectric infrared sensor are disclosed. With this configuration, glass having excellent transmissivity of infrared rays, no poisonous characteristic and difficulty to be crystallized is obtained and the glass is subjected to thermal pressing work to form a lens. The lens and a pyroelectric infrared sensor are combined to obtain a scanning type human body detecting sensor device. Further, the scanning type human body detecting sensor device can be used to detect a plurality of human bodies simultaneously.

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M. Vlcek, et al "Preparation of germanium-antimony-sulfur glasses with reduced hydrogen content and their stability under atmospheric conditions," Chemical Abstracts, vol. 110, No. 12, abstract No. 217702E, p. 315, Jun. 12, 1989.
C. N. J. Wagner, et al "The Structure of (Ge.sub.0.33 S.sub.0.67).sub.1-x Br.sub.x and (Ge.sub.0.33 S.sub.0.67).sub.1-x Br.sub.x I.sub.x Glasses," Journal of Non-Crystalline Solids, vol. 106, No. 1-3, pp. 50-55, Dec. 1988.

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