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Patent Searching and Data


Title:
PROJECTOR OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JP2013171125
Kind Code:
A
Abstract:

To provide a projector optical system that completely shields against light reflected from a prism face.

In a projector optical system that decomposes or composes light by a beam splitter and reflects the light by a DMD, thereby projecting it onto a screen, a clearance between the two prisms of the beam splitter is formed in the shape of a wedge, an angle between the normal of each prism with respect to a prism face and incident light beam is set to 72 degrees or less, and a reflection preventing film is provided on the prism face so as to continuously increase the degree of refraction index. Instead of forming the reflection preventing film, a minute projection recess cycle structure body can be formed on the prism face.


Inventors:
SUZUKI SHIGEO
ISHII FUTOSHI
Application Number:
JP2012034107A
Publication Date:
September 02, 2013
Filing Date:
February 20, 2012
Export Citation:
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Assignee:
TOPCON CORP
International Classes:
G02B19/00; G02B1/11; G02B1/115; G02B5/04; G03B21/00; G03B21/14
Attorney, Agent or Firm:
Toru Tanabe