Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OPTICAL MATERIAL, AND OPTICAL ELEMENT, DIFFRACTIVE OPTICAL ELEMENT AND MULTI-LAYER DIFFRACTIVE OPTICAL ELEMENT FORMED WITH THIS MATERIAL
Document Type and Number:
Japanese Patent JP2008169299
Kind Code:
A
Abstract:

To provide an optical element having stable diffraction efficiency in each working wavelength region in the entire visible region of a diffractive optical element.

An organic optical material is used in which the relationship between the Abbe number (d) and the secondary dispersion (g, F) is expressed by the formula:g, F-210-3d+0.59. As a result, the optical element is obtained which does not cause partial efficiency drops with wavelengths and in which the diffraction efficiency is improved in each working wavelength region in the entire visible region and the chromatic aberration is more precisely corrected.


More Like This:
JP5022561Environmental purification materials
JP2020164756COMPOSITION FOR HEAT RADIATION MEMBER, HEAT RADIATION MEMBER, ELECTRONIC APPARATUS, AND METHOD FOR MANUFACTURING HEAT RADIATION MEMBER
JP2021527151New use of mineral fillers
Inventors:
IWASA HIDEFUMI
Application Number:
JP2007003597A
Publication Date:
July 24, 2008
Filing Date:
January 11, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CANON KK
International Classes:
C08L101/00; C08L101/12; G02B1/04; G02B5/18
Domestic Patent References:
JP2005336247A2005-12-08
Foreign References:
WO2006090614A12006-08-31
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata



 
Previous Patent: RUBBER COMPOSITION AND PNEUMATIC TIRE USING SAME

Next Patent: INTERCALATION COMPOUND AND COMPOSITE MATERIAL