Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICAL DIAPHRAGM
Document Type and Number:
Japanese Patent JP2015152872
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fixed type optical diaphragm that can perform an independent control of F-numbers of two optical systems respectively by a single optical diaphragm in a structured optical three-dimensional shape measurement device having a polarization optical system approximately common in an illumination optical system and observation optical system.SOLUTION: By using a linear polarization plate (polarizer) as a material of an optical diaphragm, the linear polarization plate is cut and machined to a single ring-shape disk, which in turn configures a fixed optical diaphragm having two kinds of different F-numbers by the single disk with respect to two kinds of orthogonal polarization optical systems with the same optical axis.

Inventors:
HARA HIDEO
Application Number:
JP2014028994A
Publication Date:
August 24, 2015
Filing Date:
February 18, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIIMURA MINORU
SEIKOWAVE INC
International Classes:
G03B9/02; G01B11/25; G02B1/11; G02B5/30