Abstract:
According to an embodiment, a projection optical system for an image projection device, that includes a plurality of lenses. The projection optical system satisfies conditional expression (1): where fw is a focal length of a lens having the weakest refractive power in the lenses and f is a focal length of the whole projection optical system.
Abstract:
An imaging system is provided having an image sensor, an electrowetting lens positioned in front of the image sensor and configured to change at least one optical characteristic in response to an electrical stimulus so as to change a field of view of the image sensor, and a controller coupled to the electrowetting lens and configured to select a field of view of the image sensor by selecting the electrical stimulus to be applied to the electrowetting lens.
Abstract:
Technologies described herein provide an enhanced lens assembly. In some configurations, a lens assembly includes a barrel configured with a number of components arranged therein. The components include at least a first lens, a second lens and a spacer positioned between the lenses. At least one lens is fastened to the barrel by one or more techniques, which may include the application of an adhesive to hold the lens in a predetermined location within the barrel. In other techniques, a lens is fastened to the barrel by the use of a laser or other like device configured to weld the lens to the barrel. In some configurations, the first lens and the second lens can be separated by a spacer that is made from a material having a linear thermal expansion coefficient within a predetermined range.
Abstract:
A dynamic iris is located on the imaging path of an optical lens system that includes a relay lens system and at least one projection lens system. A dynamic iris modulates image frames in an image data stream, resulting in a reduction in light transmission associated with the modulated image frames. A dynamic iris may be configured to change the size of its aperture as fast as or faster than the image frame period of the image data stream, and may be located at or near the pupil of a relay lens system, a projection lens system, or both. A second dynamic iris in the imaging path further modulates the image frames, resulting in a further reduction in light transmission. A dynamic iris may modulate an image frame based on an electronic preview of the image frame or based on metadata associated with the image frame.
Abstract:
본 발명은 레이저다이오드 액정 프로젝터에 관한 것이다. 본 발명에서는 광원은 녹색을 출사하는 G 레이저다이오드와, 청색을 출사하는 B 레이저다이오드와, G 레이저다이오드 또는 B 레이저다이오드의 전원인가핀의 설치 방향과 수직되게 전원인가핀이 놓여지도록 설치되는 붉은색을 출사하는 R 레이저다이오드로 이루어지며, 이에 적합한 광학 구조가 제안된다. 본 발명에 의해서 별도의 복잡한 광학소자 를 사용하지 않고서도 레이저다이오드의 핀 배치를 효율적으로 변경함으로써 액정으로 형성되는 광모듈레이터로 입사되는 R, G, B 광원의 편광 방향을 일치시킬 수 있게 되었다.
Abstract:
A transparent display device includes a screen that has a plurality of light deflecting elements that are separated by transparent areas, and a projector device. The projector device is configured to direct light onto the light deflecting elements and not onto the transparent areas. The display device may include a first screen and a second screen separated longitudinally relative to the projector, wherein each screen respectively has a plurality of light deflecting elements. The projector is configured to direct light onto the light deflecting elements and not onto the transparent areas of the two screens such that light from the first and second light deflecting elements appear in different virtual depth planes. Alternatively, a single screen may have first and second pluralities of light deflecting elements of different optical powers, such that light from the first and second light deflecting elements appear in different virtual depth planes.