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US 11,693,162 B2Granted
Optical test apparatus and optical test method
AssigneeKabushiki Kaisha Toshiba
InventorsHiroya Kano, Hiroshi Ohno, Hideaki Okano
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Abstract
An optical test apparatus includes a light convergence element, an optical filter, and an image sensor. The light convergence element converges light from a subject. The optical filter is arranged on an optical axis of the light convergence element. The image sensor is arranged in an effective region not crossing the optical axis of the light convergence element, and receives light passing through the light convergence element and the optical filter.
Claims10
An optical test apparatus comprising:
- a light convergence element for converging light from a subject;
- an optical filter arranged on an optical axis of the light convergence element;
- and
- an image sensor that receives light passing through the light convergence element and the optical filter, wherein
- an entire body of the image sensor is arranged in an effective region not crossing the optical axis of the light convergence element,
- the optical filter includes:
- a first optical filter arranged on an image-side focal plane of the light convergence element;
- and
- a second optical filter arranged on an image-side principal point plane of the light convergence element,
- the light convergence element includes a pair of lenses symmetrical to each other with respect to a surface orthogonal to the optical axis,
- the second optical filter is arranged between the pair of lenses, and
- the imaging sensor receives a light ray having a first characteristic and a light ray having a second characteristic emitted from a same object point and passing through the first optical filter and the second optical filter.
9 more elements
Dependencies are inferred from the claim text.