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US7072114B2
(en)
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Optical pickup using an optical phase plate and which is compatible with optical recording media of different types
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USRE43106E1
(en)
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Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens
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US3388650A
(en)
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Multifocal camera
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US8724230B2
(en)
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Endoscope objective optical system
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US4741605A
(en)
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Multifocal objective
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GB335696A
(en)
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Improvements in or relating to method of and apparatus for producing photographic images
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US3588227A
(en)
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Lens system for focusing two spaced objects on the same focal plane
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US2546996A
(en)
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Deep focus lens
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US2546995A
(en)
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Condensing stereoscopic lens
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DE416246C
(de)
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Zusatzsystem, welches dazu bestimmt ist, innerhalb eines Lichtbildsystems oder in dessen unmittelbarer Nachbarschaft angebracht zu werden
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CH378559A
(de)
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Polyfokal-Linsensystem
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FR833904A
(fr)
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Perfectionnements aux dispositifs optiques pour la photographie
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SE115876C1
(fi)
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