Apparatus and a method for separating a light beam using a hybrid dichroic mirror and a method for manufacturing the apparatus
First Claim
1. A light separation apparatus using a flat plate formed of a material comprising:
- a wide band anti-reflection coating film for allowing an incident light beam generated by a light source to penetrate into the material at a first angle without reflection;
a first dichroic mirror allowing only a light beam with a first wavelength to penetrate outside the material at said first angle and reflecting light beams with other wavelengths at a second angle, from the light beam penetrated through said wide band anti-reflection coating film;
a wide band high-reflection coating film reflecting at the second angle the light beam reflected by the first dichroic mirror;
a second dichroic mirror allowing only a light beam with a second wavelength to penetrate at the first angle so that it is parallel to the light beam with the first wavelength penetrated by the first dichroic mirror, and reflecting the light beam with a third wavelength at the second angle, from the light beam reflected from the wide band high-reflection coating film;
the wide band high-reflection coating film reflecting at the second angle the light beam with the third wavelength reflected by the second dichroic mirror;
an anti-reflection coating film allowing the light beam with the third wavelength to penetrate outside the material at the first angle without reflection so that it is parallel to the light beam with the second wavelength penetrated through the second dichroic mirror; and
wherein the light beam penetrated through the wide band anti-reflection coating film and the light beam reflected by the first dichroic mirror, the second dichroic mirror, and the wide band high-reflection coating film pass through the material.
1 Assignment
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Accused Products
Abstract
A light separation apparatus using a flat plate including a wide band anti-reflection coating film, first and second dichroic mirrors, a wide band high-reflection coating film, an anti-reflection coating film, and a material forming the flat plate. The wide band anti-reflection coating film allows an incident light beam generated by a light source to penetrate into the material at a first angle without reflection. The first dichroic mirror allows only a light beam with a first wavelength to penetrate at the first angle and reflects light beams with other wavelengths at the second angle. The high-reflection coating film reflects at a second angle the light beam reflected by the first dichroic mirror. The second dichroic mirror allows only a light beam with a second wavelength to penetrate outside the material at the first angle so that it is parallel to the light beam with the first wavelength penetrated through the first dichroic mirror. The second dichroic mirror also reflects the light beam with a third wavelength at a second angle. The high-reflection coating film reflects the light beam reflected from the second dichroic mirror at the second angle. The anti-reflection coating film allows the light beam with the third wavelength to penetrate outside the material at the first angle without reflection so that it is parallel to the light beam with the second wavelength penetrated through the second dichroic mirror. The light beam penetrated through the wide band anti-reflection coating film and the light beams reflected from the first dichroic mirror, the second dichroic mirror, and the wide band high-reflection coating film pass through the material.
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Citations
15 Claims
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1. A light separation apparatus using a flat plate formed of a material comprising:
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a wide band anti-reflection coating film for allowing an incident light beam generated by a light source to penetrate into the material at a first angle without reflection; a first dichroic mirror allowing only a light beam with a first wavelength to penetrate outside the material at said first angle and reflecting light beams with other wavelengths at a second angle, from the light beam penetrated through said wide band anti-reflection coating film; a wide band high-reflection coating film reflecting at the second angle the light beam reflected by the first dichroic mirror; a second dichroic mirror allowing only a light beam with a second wavelength to penetrate at the first angle so that it is parallel to the light beam with the first wavelength penetrated by the first dichroic mirror, and reflecting the light beam with a third wavelength at the second angle, from the light beam reflected from the wide band high-reflection coating film; the wide band high-reflection coating film reflecting at the second angle the light beam with the third wavelength reflected by the second dichroic mirror; an anti-reflection coating film allowing the light beam with the third wavelength to penetrate outside the material at the first angle without reflection so that it is parallel to the light beam with the second wavelength penetrated through the second dichroic mirror; and wherein the light beam penetrated through the wide band anti-reflection coating film and the light beam reflected by the first dichroic mirror, the second dichroic mirror, and the wide band high-reflection coating film pass through the material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of light separation using a flat plate formed of a material comprising the steps:
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allowing an incident light beam which is admitted at the first angle to penetrate into the material without reflection; allowing only a light beam with a first wavelength from the incident light beam to penetrate outside the material at the first angle and first-reflecting light beams with other wavelengths within the material at the second angle; second-reflecting the first-reflected light beam within the material at the second angle; allowing only a light beam with a second wavelength to penetrate outside the material at the first angle and third-reflecting a light beam with a third wavelength at the second angle from the second-reflected light; fourth-reflecting the third-reflected light beam within the material at the second angle; and allowing the light beam with the third wavelength to penetrate outside the material at the first angle without reflection. - View Dependent Claims (11, 12, 13, 14)
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15. A method for manufacturing a light separation apparatus using a flat plate formed of a material comprising the steps of:
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applying a wide band anti-reflection coating film to a part of a first side of the flat plate, the flat plate having a thickness t, a refractive index n, and sufficient flatness of the first side and a second side opposite to the first side to allow penetration of an incident light beam generated by a light source into the material at a first angle without reflection; applying a first dichroic mirror to a part of the second side of the flat plate to allow only a light beam with a first wavelength to penetrate at the first angle and to reflect light beams with other wavelengths at a second angle from the light beam penetrated through the wide band anti-reflection coating film; applying a wide band high-reflection coating film to a remaining area of the first side of the flat plate to reflect the light beam reflected by the first dichroic mirror at the second angle; applying a second dichroic mirror on the second side of the flat plate adjacent to the first dichroic mirror to allow a light beam with a second wavelength to penetrate at the first angle and to reflect a light beam with a third wavelength at the second angle; and applying an anti-reflection coating film on the second side of the flat plate adjacent to the second dichroic mirror to allow the light beam with the third wavelength to penetrate at the first angle without reflection.
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Specification