IMAGE ACQUISITION APPARATUS, IMAGE ACQUISITION METHOD, AND MEDIUM
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United States of America
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Apr 25, 2024
app pub date -
Oct 13, 2023
filing date -
Oct 13, 2023
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Abstract
An apparatus acquiring an image of a subject of a phase object includes: a first light irradiation unit irradiating the subject with a parallel light as a first light; a second light irradiation unit irradiating the subject with a second light at an incidence angle different from that of the first light irradiation unit; an imaging lens having a telecentric optical system; and an imaging unit which images the subject irradiated with at least one of the first light and the second light through the imaging lens, wherein the optical axis of the imaging lens is parallel to an optical path of the first light irradiation unit, the imaging unit is arranged on the optical axis opposite to the first light irradiation unit to the subject, and an optical path length adjusting unit controlling the distance between the telecentric optical system and the subject on the optical axis is arranged.
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