At least one of the component lenses moves to adjust the system's focus. An image display system that includes such a projection lens system can project digital optical images for projection and other image display applications.doi:US7054069 B1Anurag GuptaUS...
PROBLEM TO BE SOLVED: To solve the problem that the projection field angle of a projection lens for an image projection device is normally fixed, however, when a distance between a projection screen and the image projecting device is fixed according to an indoor environment, projected images are...
必应词典为您提供projection-lens的释义,un. 聚光透镜;放映镜头; 网络释义: 投影镜头;投影机镜头;投影透镜;
A projection lens enlarges and projects optical images in a matrix type light valve onto a screen. The projection lens includes a front lens group of the retrofocusing type; a rear lens with aspherical surfaces whose radii of curvature in the peripheral portion are shorter than that in the ce...
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A microlithographic projection exposure apparatus includes an illumination system and a projection lens which images a reticle onto a photosensitive layer. The projection exposure apparatus further includes an immersion arrangement for i... D Fiolka - US 被引量: 118发表: 2005年 Method For Distortion...
The distance the projector needs to be away from the screen is called the Throw Distance. This distance is determined by the projector that you use (more specifically by the lens of the projector) and the width of the projection image that you want to get. Every lens of a projector has ...
Projection lens and image display system A projection lens system is comprised of five lens groups. A first lens group forms a negative power lens group, and a second lens group forms a positive power lens group. Third, fourth, and fifth lens groups, when combined, form a posit... A ...
A high-performance dioptric reduction projection lens and projection exposure apparatus and projection exposure method using same. The projection lens includes six lens groups and has a positive negative positive negative positive refractive power arrangement. The third and fifth lens groups have overall ...
Development of a maglev lens driving actuator for off-axis control and adjustment of the focal point in laser beam machining In laser beam machining, the machining speed and quality are very sensitive to the flow of the assist gas and the position of the focal point of the laser ... D He...