Infrared intrusion detector

Details Infrared intrusion detector Infrared intrusion detector

1986-01-13

1987-11-24

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, G01J 508

Patent

active

047091525

ABSTRACT:
An infrared intrusion detector having a predetermined number of rows of radiation reception zones comprises a primary reflector and a secondary reflector for each row of radiation reception zones. The primary reflectors and their associated secondary reflectors form a folded radiation path. The folded radiation path allows for compact construction and simple manufacturing of the infrared intrusion detector. One reflector of each radiation reception zone forms together with the infrared sensor a compact structural unit. The other reflectors of each radiation reception zone are combined to form a further structural unit which is arranged in a predetermined spaced relationship to the first compact structural unit. In order to achieve uniform detection sensitivity in radiation reception zones having different angles of inclination to the horizontal plane, a larger focal length is chosen for radiation reception zones with smaller angles of inclination and longer range. Likewise, to achieve uniform detection sensitivity even with oblique infrared radiation impingement, the surface area of the primary reflectors increases within each horizontal row from the middle to the sides.

REFERENCES:
patent: 3703718 (1972-11-01), Berman
patent: 4263585 (1981-04-01), Schaefer
patent: 4271360 (1981-06-01), Ward
patent: 4339748 (1982-07-01), Guscott et al.
patent: 4551711 (1985-11-01), Akiyama et al.

Affiliated with

Also associated with

Rating

Infrared intrusion detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Infrared intrusion detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared intrusion detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2424492