Lens measuring method and lens measuring device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsJUN YOKOYAMA, YASUHIRO KABETANI
Life of this patent
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Abstract
A surface shape of first face (8a) of lens (8) is measured with shape measurement unit (2) to determine a center position of first face (8a) of lens (8) from a measurement result, lens (8) is positioned in transmission wavefront measurement unit (3) based on the center position of first face (8a) of lens (8) and a relative position between shape measurement unit (2) and transmission wavefront measurement unit (3), a transmission wavefront of lens (8) is measured with transmission wavefront measurement unit (3), and an optical characteristic of lens (8) is obtained from the transmission wavefront.
Claims9
A lens measurement method using a shape measurement unit that measures a surface shape of a lens and a transmission wavefront measurement unit that measures a transmission wavefront of the lens, the method comprising:
- measuring a surface shape of a first face of the lens with the shape measurement unit to determine a center position of the first face of the lens from a result of the measuring of the surface shape;
- positioning the lens in the transmission wavefront measurement unit based on the center position of the first face of the lens and a relative position between the shape measurement unit and the transmission wavefront measurement unit;
- measuring the transmission wavefront of the lens with the transmission wavefront measurement unit;
- and
- obtaining an optical characteristic of the lens from a result of the measuring of the transmission wavefront.
A lens measurement device comprising:
- a shape measurement unit that measures a surface shape of a first face of a lens;
- a shape measurement calculation unit that determines a center position of the first face of the lens from a measurement result in the shape measurement unit;
- a transmission wavefront measurement unit that measures a transmission wavefront of the lens that has been positioned based on a relative position with the shape measurement unit and the center position of the first face of the lens;
- and
- a calculation unit that obtains an optical characteristic of the lens from a result of measuring the transmission wavefront of the lens with the transmission wavefront measurement unit.
Dependencies are inferred from the claim text.