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US 9,519,127 B2Granted
Zoom lens
AssigneeHamamatsu Photonics K.K.
InventorsNaoya Matsumoto, Takashi Inoue, Yuu Takiguchi
Life of this patent
Estimating the term…
Abstract
A zoom lens includes a first lens unit including one of an SLM or a VFL, a second lens unit being optically coupled between the first lens unit and a focal plane and including one of an SLM or a VFL, and a control unit controlling focal lengths of the first and second lens units. A distance between the first lens unit and the second lens unit and a distance between the second lens unit and the focal plane are invariable. The control unit changes a magnification ratio of the zoom lens by changing the focal lengths of the first and second lens units.
Claims6
A zoom lens comprising:
- a reflection type spatial light modulator having a single light-reflecting surface that includes a first region and a second region, the second region being optically coupled between the first region and a focal plane of the zoom lens;
- and
- a control unit configured to provide a lens pattern to the reflection type spatial light modulator for displaying a first lens having a first focal length on the first region and displaying a second lens having a second focal length on the second region, and control the first focal length and the second focal length, wherein
- a distance between the first region and the second region, and a distance between the second region and the focal plane are both invariable, and
- the control unit changes a magnification ratio of the zoom lens by changing the first focal length and the second focal length.
2 more elements
Dependencies are inferred from the claim text.