INFORMATION ACQUISITION APPARATUS
The invention provides an information acquisition apparatus which is provided with an illumination unit, an imaging optical system, and an imaging element. The imaging optical system comprises, in order from the object side, an incident-side lens group, an aperture unit, and an exit-side lens group....
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
08.08.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides an information acquisition apparatus which is provided with an illumination unit, an imaging optical system, and an imaging element. The imaging optical system comprises, in order from the object side, an incident-side lens group, an aperture unit, and an exit-side lens group. Each of the incident-side lens group and the exit-side lens group comprises a plurality of positivelenses and at least one negative lens, and the following conditional expressions (1)-(9) shown in the description are satisfied. |
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Bibliography: | Application Number: US201916259482 |