Title:
OPTICAL PARTS FOR UNIFORMING LUMINOUS FLUX
Document Type and Number:
Japanese Patent JPH02294614
Kind Code:
A
Abstract:
PURPOSE:To uniform luminous flux by bending the optical axis of luminous flux which is made incident on an incidence surface perpendicularly by a transparent plate by a specific angle and restoring the luminous flux to luminous flux parallel to the original axis by a transparent plate which is arranged at a constant distance. CONSTITUTION:The light beam which is made incident on the +theta surface is changed in direction by refraction by the angle alpha satisfying an equation I and becomes a light beam having an angle beta, satisfying an equation II, to the X axis by refraction when exiting from the transparent plate 1. Further, when the light beam enters the transparent plate 2, the angle to the X axis becomes alphaagain and the light beam reaches a projection surface 23. The distance Q that the light beam travels in a Y-axial direction until it reaches the projection surface 23 is shown by an equation III eventually. This light beam is projected from the +theta surface, so the light beam which is made incident on the +theta surface and exits from the +theta surface and the light beam which is made incident on a -theta surface and exits from the -theta surface similarly exits shifting in parallel by Q and -Q respectively. Consequently, the high-efficient uniform luminous flux is obtained.
More Like This:
Inventors:
OOISHI NORIJI
Application Number:
JP11512989A
Publication Date:
December 05, 1990
Filing Date:
May 10, 1989
Export Citation:
Assignee:
MITSUBISHI RAYON CO
International Classes:
G02B5/04; G02B27/00; (IPC1-7): G02B5/04; G02B27/00
Attorney, Agent or Firm:
Yamashita