Title:
OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JP2023089066
Kind Code:
A
Abstract:
To provide an optical system which can make the peak of the luminous intensity of emitted light closer to a wide angle side than before while suppressing the reduction of light quantity even when an obstacle such as a partition wall for separating a normal light source is present outside a lens in the optical system used as the emergency light.SOLUTION: Disclosed is an optical system arranged in a housing part having a wall part separating the housing part from a regular light source and used as the emergency light which includes: a light source having a square light-emitting surface in which four light-emitting parts are arranged vertically and horizontally in two rows; a lens which is formed in a rotationally symmetric shape, has the incident surface on which light is incident and the emission surface from which light is emitted, and deflects the light emitted from the light source so as to avoid the wall part; and a socket for fixing the light source and the lens so that the center axis of the lens and the optical axis of the light source coincide with each other.SELECTED DRAWING: Figure 1
Inventors:
ITOGA KENJI
ISHII KENGO
FUSE JUNICHI
ISHII KENGO
FUSE JUNICHI
Application Number:
JP2023061104A
Publication Date:
June 27, 2023
Filing Date:
April 05, 2023
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
MITSUBISHI ELECTRIC LIGHTING CORP
MITSUBISHI ELECTRIC LIGHTING CORP
International Classes:
G02B3/00; F21S9/02; F21V5/00; F21V5/04; G02B5/00
Attorney, Agent or Firm:
Patent Attorney Corporation Kisa Patent and Trademark Office