Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HOLOGRAM ELEMENT AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH06194523
Kind Code:
A
Abstract:

PURPOSE: To easily produce a hologram element.

CONSTITUTION: This element consists of the grating layer of the phase compensating film 12 of a periodic dielectric provided on the principal plane of a lithium niobate substrate 10 and the optical diffraction grating layer of the proton- exchange region 11 furnished on the dielctric-free region. Although the element is produced by the self alignment method to realize a high quenching ratio, the man-hour for the production is drastically reduced.


Inventors:
OBA AKITOMO
Application Number:
JP29285392A
Publication Date:
July 15, 1994
Filing Date:
October 30, 1992
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NEC CORP
International Classes:
G02B5/18; G02B5/32; (IPC1-7): G02B5/32; G02B5/18
Domestic Patent References:
JPH04219701A1992-08-10
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)