Masanori Iye has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: In order to provide a grism wherein even if the vertex angle of a prism increases, it does not exceed its critical angle, besides, which can elevate its efficiency, and mass-production of which is possible, whereby reduction in cost of which can be realized. The grism comprises a first prism having a high refractive index, a second prism having a high refractive index, and a volume phase grating used for a diffraction grating; and the vertex angle of the first prism being opposed to the vertex angle of the second prism so as to sandwich the volume phase grating between the first prism and the second prism.
Type:
Grant
Filed:
June 29, 2001
Date of Patent:
October 22, 2002
Assignee:
Riken
Inventors:
Noboru Ebizuka, Masanori Iye, Koji Sugioka, Toshikazu Ebisuzaki
Abstract: In order to provide a grism wherein even if the vertex angle of a prism increases, it does not exceed its critical angle, besides, which can elevate its efficiency, and mass-production of which is possible, whereby reduction in cost of which can be realized. The grism comprises a first prism having a high refractive index, a second prism having a high refractive index, and a volume phase grating used for a diffraction grating; and the vertex angle of the first prism being opposed to the vertex angle of the second prism so as to sandwich the volume phase grating between the first prism and the second prism.
Type:
Application
Filed:
June 29, 2001
Publication date:
January 24, 2002
Inventors:
Noboru Ebizuka, Masanori Iye, Koji Sugioka, Toshikazu Ebisuzaki
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