Short-focus projection lens structure with transmittance of 0.52
A short-focus projection and transmittance technology, which is applied in optics, instruments, projection devices, etc., can solve difficult problems such as projection ratio, and achieve the effect of small brightness loss and light energy loss
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[0014] The present invention will be further described below in conjunction with accompanying drawing:
[0015] Such as figure 1 As shown, the present invention has 12 lens compositions. Its design structure is lenses 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 arranged in sequence. Among them, lens 1 is a negative meniscus aspherical lens, and lens 2 is also a negative Meniscus spherical lens, lens 3 is a double-concave spherical lens, lens 4 is a single convex spherical lens, lens 5 is a negative meniscus spherical lens, lens 6 is a double-convex lens, lenses 7 and 8 are cemented lens groups, and lens 7 It is a biconvex lens, eyeglass 8 is a biconvex lens, eyeglasses 9 and 10 are a cemented lens group, wherein eyeglass 9 is a biconvex lens, eyeglass 10 is a biconcave lens, eyeglass 11 is a biconvex lens, and eyeglass 12 is a biconvex lens.
[0016] In the present invention, according to the characteristics of the application, the field angle of the short-focus projection lens is...
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