Title:
ILLUMINATION DEVICE
Document Type and Number:
Japanese Patent JP3685516
Kind Code:
B2
Abstract:
PURPOSE: To highly maintain condensing efficiency and to miniaturize an illumination device sufficiently in the illumination device shining divergent light emitted from a light source forward.
CONSTITUTION: A prism 11 provided with a first incident surface 11a on which the light emitted obliquely forward from the light source 10 is made incident, a total reflection surface 11c totally reflecting the light transmitted through the first incident surface 11a forward, a second incident surface 11b being a positive refracting surface on which the light emitted mainly forward from the light source 10 is made incident and an emitting surface 11d emitting the light transmitted through the second incident surface 11b and the light totally reflected on the total relection surface 11c is arranged more forward than the center of the light source 10. Besides, this device is provided with a reflection mirror 12 reflecting the light emitted sideways and backward from the light source 10 mainly forward.
Inventors:
Yoji Naka
Application Number:
JP6819495A
Publication Date:
August 17, 2005
Filing Date:
March 27, 1995
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03B15/02; F21L4/00; F21V33/00; G03B15/05; (IPC1-7): G03B15/05; F21L4/00; F21V33/00; G03B15/02
Domestic Patent References:
| JP2135328A | ||||
| JP4138438A | ||||
| JP4147118A |
Foreign References:
| US2356654 |
Attorney, Agent or Firm:
Yanagita Seiji
Go Sakuma
Go Sakuma