US 2020/0004106 A1 · IMAGE DISPLACEMENT DEVICE

Abstract

An image displacement device includes a projection lens and a first grating. The projection lens has a lens group, and the lens group includes a first lens and a second lens, where no lens with refractive power is disposed between the first lens and the second lens. The first grating is switchable between a diffracting state and a non-diffracting state, and the first grating is disposed on one side of the first lens facing away from the second lens. A distance between the first grating and an aperture stop of the projection lens measured along an optical axis of the projection lens is smaller than a distance between the first grating and the second lens measured along the optical axis of the projection lens.

Claims20

Dependent claims

An image displacement device, comprising:

a projection lens having a lens group, the lens group comprising a first lens and a second lens, and no lens with refractive power being disposed between the first lens and the second lens;
and
a first grating switchable between a diffracting state and a non-diffracting state, the first grating being disposed on one side of the first lens facing away from the second lens, and a distance between the first grating and an aperture stop of the projection lens measured along an optical axis of the projection lens being smaller than a distance between the first grating and the second lens measured along the optical axis of the projection lens.

Dependencies are inferred from the claim text.

Image displacement device

Life of this patent

Image displacement device

Life of this patent

Abstract

Claims20