Digital film exposure device

Abstract

The invention discloses a digital film exposure device which comprises a first optical lens, a second optical lens, a third optical lens, a fourth optical lens, a fifth optical lens, a doublet objective lens, a first convex lens, a second concave lens, a sixth optical lens, a seventh optical lens, a light combination prism, a PBS prism and a PLCOS packaging lens which are installed in a lens cone. The first optical lens is provided with a second optical lens, the second optical lens is provided with a third optical lens, the third optical lens is provided with a fourth optical lens, the fourth optical lens is provided with a fifth optical lens, and the fifth optical lens is provided with a doublet objective lens. And a seventh optical lens is arranged on the sixth optical lens. The invention relates to a digital film exposure device, which has the characteristics of realizing a parallel projection function of image light beams, realizing focusing in a larger range by utilizing parallel projection of the light beams and reducing the distortion rate of patterns.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, in particular to a digital film exposure device. Background technique [0002] In the application of film exposure, the existing commonly used exposure devices include cameras, video cameras, etc., and the core of this device is the optical element. Common lenses include Petzval portrait lenses, fast linear lenses, double Gauss lenses, and telescopes. lens, anti-telescopic (rear focusing) lens, and Cooke three-element lens. However, there are some problems in the current exposure device: 1. When the image beam is enlarged, the focal length is difficult to control, and a corresponding distance measuring device is required to adjust the focus. At this time, in addition to the difficulty of controlling the focal length, the energy of light will also be greatly improved, similar to focusing. In this case, when imaging, the light source will be too concentrated, and halos will appear on the pi...

AI Technical Summary

Problems solved by technology

However, there are some problems in the current exposure device: 1. When the image beam is enlarged, the focal length is difficult to control, and a corresponding distance measuring device is required to adjust the focus. At this time, in addition to the difficulty of controlling the focal length, the energy of light will also be greatly improved, similar to focusing. In this case, when imaging, the light source will be too concentrated, and halos will appear on the pixel boundary, which cannot be distinguished; 3. For materials Special requirements, not universal

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