Title:
投光器
Document Type and Number:
Japanese Patent JP7424254
Kind Code:
B2
Abstract:
To provide a projector capable of suppressing the glare even when increased in beam angle.SOLUTION: A projector 1 comprises a plurality of light-emitting elements and parabolic reflection surfaces 50 provided at the plurality of light-emitting elements respectively. The parabolic reflection surfaces 50 are each provided, at two places facing a horizontal direction DH in an installed state, with groove-shaped recessed parts 56 each of which is recessed toward a center axis AP of rotation of the parabolic reflection surface 50 and also extends from an emission end 42T2 of the parabolic reflection surface 50 toward the light-emitting element, and a depth Dp of each of recessed parts 56 at the emission end 42T2 of the parabolic reflection surface 50 is 30-65% of a radius RT of the parabolic reflection surface 50 at the emission end 42T2.SELECTED DRAWING: Figure 6
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Inventors:
Oumi Fukuda
Takeshi Toto
Tetsushi Yamada
Takeshi Toto
Tetsushi Yamada
Application Number:
JP2020149986A
Publication Date:
January 30, 2024
Filing Date:
September 07, 2020
Export Citation:
Assignee:
Iwasaki Electric Co., Ltd.
International Classes:
F21S2/00; F21V5/00; F21V7/06; G02B3/00; G02B5/10
Domestic Patent References:
| JP2020508553A | ||||
| JP2014235820A | ||||
| JP2011198757A |
Foreign References:
| WO2018061407A1 | ||||
| US10330902 |
Attorney, Agent or Firm:
Kushibuchi International Patent Office
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