Optical system for projector and imaging method thereof
AssigneesQisda Corporation, Benq Corporation
InventorsLung-Ta Lin, Tsang-Chi Wang, Ming-Kuen Lin
Life of this patent
Estimating the term…
Abstract
An optical system for a projector and an imaging method thereof. A light beam from a light source passes through a first lens set and a second lens set sequentially. The light beam having passed through the second lens set is reflected by a first mirror to pass through the second lens set again and arrived at an imaging device. The light is reflected from the imaging device to a projection lens set to project the light beam onto a screen.
Claims17
An optical system for a projector, comprising:
- a light source;
- a first lens set;
- a second lens set;
- a first plane mirror;
- an imaging device;
- and
- a projection lens set, wherein a light beam from the light source passes through the first lens set and the second lens set sequentially, and the light beam having passed through the second lens set is reflected by the first plane mirror to pass through the second lens set again and arrive at the imaging device and the projection lens set sequentially.
An imaging method of an optical system for a projector, comprising the following steps:
- providing a light source;
- enabling a light beam from the light source to pass through a first lens set;
- enabling the light beam having passed through the first lens set to pass through a second lens set;
- reflecting the light beam having passed through the second lens set by a first plane mirror to pass through the second lens set again to arrive at an imaging device;
- and
- delivering the light beam arrived at the imaging device to a projection lens set projecting the light beam onto a screen.
An imaging method of an optical system for a projector, comprising the following steps:
- providing a light source;
- enabling a light beam from the light source to pass through a first lens set comprising a lens assembly and a second mirror, wherein the light beam passes through the lens assembly and is reflected by the second mirror;
- enabling the light beam having passed through the first lens set to pass through a second lens set;
- reflecting the light beam having passed through the second lens set by a first mirror to pass through the second lens set again to arrive at an imaging device;
- delivering the light beam arrived at the imaging device to a projection lens set projecting the light beam onto a screen, the method further comprising the steps of:
- defining the plane on which the imaging device is positioned as a standard plane on
- which an x axis and a y axis normal to the x axis are defined;
- defining a first optical path along which the light beam from the light source travels through the lens assembly to the second mirror;
- defining a second optical path along which the light beam from the second mirror travels through the second lens set to the first mirror;
- defining a third optical path along which the light beam from the first mirror travels through the second lens set to the imaging device;
- and
- defining a fourth optical path along which the light beam from the imaging device travels to the projection lens set.
Dependencies are inferred from the claim text.