Optical Head For Receiving Light And Optical System Using The Same
AssigneeOto Photonics Inc.
InventorChien-Hsiang Hung
Life of this patent
Estimating the term…
Abstract
An optical head for receiving incident light is provided. The optical head comprises a transmissive cosine corrector and a reflector disposed to face the transmissive cosine corrector. The transmissive cosine corrector is disposed in an optical path of the incident light and shields the reflector from the incident light. The transmissive cosine corrector converts the incident light to scattered light having a Lambertian pattern. The reflector has an optical output section that transmits the scattered light and a reflective section that reflects the scattered light to the transmissive cosine corrector and/or the other portions of the reflective sections. An optical system using the optical head is also provided.
Claims29
An optical head for receiving an incident light, comprising:
- a transmissive cosine corrector disposed in an optical path of the incident light, wherein the transmissive cosine corrector is configured to convert the incident light to a scattered light in a Lambertian pattern after the incident light is incident on the transmissive cosine corrector such that light rays of the incident light incident on the transmissive cosine corrector at different angles have substantially a same transmittance;
- and
- a reflector having at least one optical output section and a reflective section, wherein the reflector is positioned to face the transmissive cosine corrector such that the transmissive cosine corrector shields the reflector from the incident light, wherein a first part of the scattered light from the transmissive cosine collector enters the at least one optical output section and a second part of the scattered light not entering the at least one optical output section is incident on the reflective section and reflected to the transmissive cosine corrector, other portions of the reflective section, or both the transmissive cosine corrector and the other portions of the reflective section.
An optical head for receiving an incident light, comprising:
- a reflector;
- a reflective cosine corrector facing the reflector and disposed in an optical path of the incident light, the reflective cosine corrector having an optical output section and a reflective scattering section, wherein the reflective cosine corrector is configured to convert the incident light incident on the reflective scattering section to a scattered light in a Lambertian pattern such that light rays of the incident light incident on the reflective cosine corrector at different angles have substantially a same reflectance, and wherein the scattered light is incident on the reflector, other portions of the reflective scattering section, or both the reflector and the other portions of the reflective scattering section;
- and
- a light collector disposed at the optical output section of the reflective cosine corrector and configured to receive the scattered light from the reflector, the light collector having a light collection range overlying an area of the reflector through which the scattered light from the reflective cosine corrector is reflected to the optical output section,
An optical system for measuring an incident light, comprising:
- an optical head, comprising:
- a transmissive cosine corrector disposed in an optical path of the incident light and configured to convert the incident light to a scattered light, and
- a reflector having at least one optical output section and a reflective section, wherein the reflector is positioned to face the transmissive cosine corrector such that the transmissive cosine corrector shields the reflector from the incident light;
- and
- at least one light detector configured to convert the scattered light from the at least one optical output section to an electrical signal.
An optical system for measuring an incident light, comprising:
- an optical head, comprising:
- a reflective cosine corrector having an optical output section and a reflective scattering region, the reflective cosine corrector disposed in an optical path of the incident light and configured to convert the incident light to a scattered light and output the scattered light via the optical output section;
- and
- a reflector facing the reflective cosine corrector, the reflector positioned to shield the optical output section from the incident light;
- and
- a light detector configured to measure the scattered light from the optical head.
Dependencies are inferred from the claim text.