Light condensing filter
First Claim
1. A light condensing filter having plural prisms on a surface of a flat substrate and on an opposite surface to the surface, light from a light source being condensed by the plural prisms,wherein the plural prisms on the surface each has a linear shape extending in a first direction and the plural prisms on the surface have an irregular arrangement in a second direction perpendicular to the first direction,the plural prisms on the opposite surface each has a linear shape extending in the second direction and the plural prisms on the opposite surface have an irregular arrangement in the first direction.
2 Assignments
0 Petitions
Accused Products
Abstract
A light condensing filter has plural prisms formed on a surface of a flat substrate and on the opposite surface to the surface, and light from a light source is condensed by the plural prisms, wherein the plural prisms formed on the surface are designed in a linear shape extending in a specific direction on the surface and arranged in a direction perpendicular to the specific direction, the plural prisms formed on the opposite surface are designed in a linear shape extending in the direction perpendicular to the specific direction on the opposite surface and arranged in the specific direction, and the plural prisms formed on the surface and the plural prisms formed on the opposite surface are irregularly arranged.
30 Citations
13 Claims
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1. A light condensing filter having plural prisms on a surface of a flat substrate and on an opposite surface to the surface, light from a light source being condensed by the plural prisms,
wherein the plural prisms on the surface each has a linear shape extending in a first direction and the plural prisms on the surface have an irregular arrangement in a second direction perpendicular to the first direction, the plural prisms on the opposite surface each has a linear shape extending in the second direction and the plural prisms on the opposite surface have an irregular arrangement in the first direction.
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6. A light condensing filter having plural prisms on a first surface of a flat substrate, light from a light source being condensed by the plural prisms,
wherein the plural prisms on the first surface each has a linear shape extending in a first direction on the first surface and a same top angle and the plural prisms have an irregular arrangement in a continuous way in a second direction perpendicular to the first direction, and the heights of the top portions of the respective prisms from the first surface are set to be equal to one another, and the heights of the respective valley portions sandwiched by respective adjacent two prisms of the plural prisms from the surface are dispersive in that the position of the top portion of each of the prisms is random and a pitch P, which is the distance between the midpoints in the prism width direction of respective adjacent two prisms in the second direction, is dispersed so that the prisms are irregularly arranged.
Specification