Light trap

Details Light trap Light trap

1996-08-28

1998-04-28

Nguyen, Thong

Optical: systems and elements

Glare or unwanted light reduction

With absorption means

359601, 359613, 385902, E02B 2700

Patent

active

057452938

ABSTRACT:
A light trap for a parallel light beam includes an entry member having a frustoconical opening in it and a conical body attached to a back wall of the trap. The frustoconical opening narrows from the outside towards the inside and has at the outside a diameter equal to the diameter D of the light beam. The entry member has a thickness E=D/(tan 2A+tan A) where A is the cone angle of the frustoconical opening. The conical body reflects light uniformly in all directions.

REFERENCES:
patent: 3647435 (1972-03-01), Land
patent: 3675984 (1972-07-01), Vulmiere et al.
patent: 4179187 (1979-12-01), Chand
patent: 4621898 (1986-11-01), Cohen
patent: 4929834 (1990-05-01), Liebson
patent: 4990782 (1991-02-01), Wellman et al.
Patent Abstracts of Japan, vol. 013, No. 407, (E-818), Sep. 8, 1989.

Affiliated with

Also associated with

Rating

Light trap does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1538419