Wide-angle projection system and lens
A projection system and projection lens technology, applied in optics, instruments, projection devices, etc., can solve the problems of increased difficulty in component manufacturing, sensitive assembly, larger size of optical components and mechanisms, etc., and achieve the effect of good resolution
Active Publication Date: 2016-09-28
YOUNG OPTICS
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Problems solved by technology
However, in order to achieve an ultra-wide angle and avoid the length of the optical path being greater than the projection distance, the straight-going optical path must be turned, which increases the size of the corresponding optical elements and mechanisms, making it more difficult to manufacture the element, and if the complex manufacturing method is used Freeform mirrors also cause quite sensitive assembly tolerances
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[0024] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.
[0025] figure 1 It is a schematic diagram of a wide-angle projection system according to an embodiment of the present invention. Such as figure 1 As shown, the wide-angle projection system 200 includes an image processing element 202 , a total reflection prism 204 , a refraction unit 210 , and a reflection unit 220 . The refraction unit 210 may include figure 1 left side) and image side (magnified side, figure 1 A first lens group 212 and a second lens group 214 between the right side), the second lens ...
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The invention provides a wide-angle projection system and a lens. The wide-angle projection system comprises a refraction unit and a reflection unit. The refraction unit comprises a first lens group with positive refractive power and a second lens group with negative refractive power. The reflection unit has positive refractive power. The second lens group is arranged between the first lens group and the reflection unit. The wide-angle projection system satisfies a condition of 0.9<A / B<1.4, wherein A is the distance of the refraction unit and the reflection unit on an optical axis of the wide-angle projection system, and B is the total length of the refraction unit on the optical axis. The wide-angle projection system can effectively shorten focal length to reduce a lens body, and can improve aberration, and the sytem has good resolution when projecting to screens in various dimensions.
Description
technical field [0001] The invention relates to a wide-angle projection system and a lens. Background technique [0002] The wide-angle projection lens can effectively shorten the distance between the projection screen and the projector, and obtain large-size projection images. However, aberrations derived from wide-angle projection lenses, such as distortion, field curvature, and astigmatism, are all problems that must be faced in the design of wide-angle projection lenses. [0003] Considering the optical characteristics and manufacturability, the wide-angle projection lenses currently on the market usually adopt a hybrid (refractive + reflective) structure. However, in order to achieve an ultra-wide angle and avoid the length of the optical path being greater than the projection distance, the straight-going optical path must be turned, which increases the size of the corresponding optical elements and mechanisms, making it more difficult to manufacture the element, and i...
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Login to View More IPC IPC(8): G02B13/06G02B13/16G03B21/14G03B21/28G02B13/18
CPCG02B13/06G02B13/16G02B13/18G03B21/142G03B21/28
Inventor 陈怡学田其锠蔡立酋钱巧萦许雅伶刘展瑜
Owner YOUNG OPTICS