Diffraction optical system using free curve surface prism, and image capturing device
A diffraction optical system comprises a free curve surface prism (14), and a multilayer diffractive optical element in which a plurality of diffractive element members (121, 122) are laminated together and a diffractive optical surface (DM) having a grating structure is formed at the interface ther...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A diffraction optical system comprises a free curve surface prism (14), and a multilayer diffractive optical element in which a plurality of diffractive element members (121, 122) are laminated together and a diffractive optical surface (DM) having a grating structure is formed at the interface thereof. The diffraction optical system further satisfies the following conditional expression: 0.005 |
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