Sub mirror and image pick-up apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorsKyong-Tae Park, Shitao Deng
Life of this patent
Estimating the term…
Abstract
An image pick-up apparatus which is capable of increasing an AF area is provided. The image pick-up apparatus includes a photographing lens to focus light received from a subject, a main mirror that passes a portion of light passing through the photographing lens and that reflects the remaining portion of the light, an auto focus module to detect the state of focus the photographing lens and a sub-mirror having a plurality of reflective areas that reflect respectively divided portions of the light passing through the main mirror and that guide the divided light portions to the auto focus module.
Claims16
An image pick-up apparatus comprising:
- a photographing lens configured to receive light from a subject;
- a main mirror configured to receive light from the photographing lens and to partially transmit therethrough the light received from the photographing lens;
- an auto focus module configured to detect a focus state of the photographing lens;
- and
- a sub-mirror comprising a plurality of reflective areas each configured to reflect a portion of the light transmitted through the main mirror and to direct the reflected portion of the light along an optical path from the sub-mirror to the auto focus module,
- wherein each of the plurality of reflective areas has a concave shape, and
- wherein the sub-mirror comprises a combination of concave surfaces each having a separate concave shape.
An auto focusing apparatus for detecting a focus state of a subject image of an image acquiring apparatus, the apparatus comprising:
- an auto focus module comprising one or more image sensors arranged along an optical path of light received from a subject so as to sense the subject image;
- and
- a sub-mirror arranged in the optical path between the subject and the auto focus module, the sub-mirror comprising a plurality of reflective areas each configured to reflect a portion of the light incident upon the sub-mirror and to direct the reflected portion of the light along an optical path from the sub-mirror to the auto focus module,
- wherein each of the plurality of reflective areas has a concave shape, and,
- wherein the sub-mirror comprises a combination of concave surfaces each having a separate concave shape.
A sub-mirror capable of being arranged in an optical path of light between a subject of an image acquisition apparatus and an auto focus module of the image acquisition apparatus that detects a focus state of an image of the subject, the sub-mirror comprising:
- a plurality of reflective surfaces each configured to reflect a portion of the light incident upon the sub-mirror and to direct the reflected portion of the light along an optical path from the sub-mirror to the auto focus module,
- wherein each of the plurality of reflective surfaces has a concave shape and the sub-mirror comprising a combination of concave surfaces each having a separate concave shape, and
- wherein the sub-minor is arranged in the optical path downstream of a main mirror of the image acquisition apparatus in such manner that the light reflected by the sub-mirror is reflected by the main mirror toward the auto focus module.
Dependencies are inferred from the claim text.