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    • 9. 发明申请
    • WIDE-ANGLE PROJECTION LENS AND OPTICAL ENGINE FOR A PROJECTION DISPLAY DEVICE
    • 用于投影显示装置的宽角度投影镜头和光学发动机
    • WO2005057267A3
    • 2005-11-24
    • PCT/US2004040474
    • 2004-12-03
    • 3M INNOVATIVE PROPERTIES CO
    • RODRIGUEZ ERNESTO M JRHUGHES PATRICIA MHAUSHALTER WILLIAM ELU KAI CHANGSAXE STEVEN G
    • G02B13/04G02B13/06G02B13/18G03B21/30
    • G02B13/06G02B13/22G03B5/04G03B21/10G03B21/30H04N9/3141
    • A wide-angle projection lens is incorporated in an optical engine for use in a short throw distance, front projection display system for a variety of applications. The front projection display device includes an optical engine including an illumination system, an imaging system, and the wide-angle projection lens. The wide-angle projection lens includes a first lens group of negative refractive power that has at least one aspheric surface. The wide-angle projection lens outputs an image at a half field angle of at least 45°, where the image has substantially no distortion. For example, when the first lens group is placed at a distance of less than 1 meter from a viewing screen, the output image has a size of about 40 inches diagonal or greater, and requires substantially no keystone correction. In other aspects, the optical engine can be implemented in a wall-mounted projection wide-angle projection lens is incorporated in an optical engine for use in a short throw distance, front projection display system for a variety of applications. The front projection display device includes an optical engine including an illumination system, an imaging system, and the wide-angle projection.
    • 广角投影透镜被并入用于短距离的光学引擎中,用于各种应用的前投影显示系统。 前投影显示装置包括具有照明系统,成像系统和广角投影透镜的光学引擎。 广角投影透镜包括具有至少一个非球面的负屈光力的第一透镜组。 广角投影透镜以至少45°的半视角输出图像,其中图像基本上没有失真。 例如,当第一透镜组从观察屏幕放置在距离小于1米的距离处时,输出图像具有约40英寸对角线或更大的尺寸,并且基本上不需要梯形失真校正。 在其他方面,光学引擎可以实现在壁挂式投影广角投影透镜中,结合在用于短距距离的光学引擎中,用于各种应用的前投影显示系统。 前投影显示装置包括具有照明系统,成像系统和广角投影的光学引擎。