All-light-path projection shading describing instrument
A pictorial instrument and projection technology, applied in the field of pictorial instruments, can solve the problems of inconvenient drawing and taking pictures, and achieve the effect of solving the inconvenient drawing and taking pictures, exquisite structure and wide adaptability
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[0015] The technical solutions and beneficial effects of the present invention will be clearer and more definite by further describing the specific embodiments of the present invention in conjunction with the accompanying drawings.
[0016] See attached Figures 1 to 4 , the present invention comprises theodolite 1 that is used for longitude and latitude adjustment and is located at the telescope 2 on the theodolite 1, and telescope 2 comprises objective lens 2a and is located at the angle eyepiece 2b of objective lens 2a rear end, is characterized in that: described objective lens 2a rear end also A zenith positive light projection mirror 2c is provided, and a bucket-shaped projection obscura 3 is set on the zenith positive light projection mirror 2c. A cover plate 4 is arranged on the top of the bucket-shaped projection obscura 3. The cover plate 4 is provided with the zenith positive light projection mirror 2c. A matching light-permeable projection photo board 5;
[0017] ...
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