Parallel projection device

Abstract

The invention discloses a parallel projection device, comprising a base, a projector, a side plate, a reflector, a reflector inclination adjustment mechanism, and a reflector arc adjustment mechanism. The projector is located on the base, and the side plate is erected on the projector. On the machine, the reflector is connected to the side plate and forms an angle α with the horizontal plane of the projector. The reflector inclination adjustment mechanism and the reflector arc adjustment mechanism are arranged on the back of the reflector. It is characterized in that the reflector arc adjustment mechanism includes: A suction cup, a circlip, a mirror fixing frame, and an adjusting nut, and the mirror inclination adjustment mechanism includes a rotating shaft and an adjusting handle. The parallel projection device of the present invention has the characteristics of small projection ratio and clear imaging, and can be used in some specific narrow spaces.

Description

technical field [0001] The invention relates to a projection system, in particular to a parallel projection device. Background technique [0002] The current projection system mainly includes two methods, one is to install on the ceiling and project the image on the projection screen or wall in a horizontal projection way; The first type is suitable for large conference rooms, and the second type is suitable for small indoors, such as offices, conference rooms, etc., but more often, it is necessary to project images in a small space, but there is no guarantee that there is a space between the projector and the projection screen. Sufficient length cannot guarantee the clarity of imaging. [0003] And existing fixed-focus projectors with a throw ratio less than 0.3 include wide-angle fixed-focus projectors with primary reflectors and have a short projection distance, but any change of the optical path due to the relationship of the fixed-focus lens must ensure that the distan...

AI Technical Summary

Problems solved by technology

The first type is suitable for large conference rooms, and the second type is suitable for small indoors, such as offices, conference rooms, etc., but more often, it is necessary to project images in a small space, but there is no guarantee that there is a space between the projector and the projection screen. Sufficient length can not guarantee the clarity of imaging

[0003] And existing fixed-focus projectors with a throw ratio less than 0.3 include wide-angle fixed-focus projectors with primary reflectors and have a short projection distance, but any change of the optical path due to the relationship of the fixed-focus lens must ensure that the distance between the image and the projector (T1 ), and the proportional relationship between the vertical distance (T2) from the bottom of the image to the extension line of the projector, otherwise it will cause distortion; and because the focal length is ...

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