360 degree field of view optical sensing device

Details 360 degree field of view optical sensing device 360 degree field of view optical sensing device

1989-10-25

1991-05-21

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, G01T 508

Patent

active

050177834

ABSTRACT:
A 360.degree. pattern field of view optical system for passive infrared detection device is disclosed. The optical system uses a combination of a fresnel lens and a fresnel prism to gather infrared radiation, focus the radiation, and refract radiation onto a focal point. Each of the combination of fresnel lens and prism is positioned substantially circumferentially about a central location to gather the infrared radiation from a 360.degree. field of view and for focusing radiation gathered onto the central location. At the central location, a sensor is located. The sensor converts the focused infrared radiation into an electrical signal.

REFERENCES:
patent: 4757204 (1988-07-01), Baldwin et al.

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