Wide-angle imaging optical system, and wide-angle imaging device, monitoring imaging device, on-vehicle imaging device, and projection device with the wide-angle imaging optical system
A technology of optical system and imaging optics, which is applied to the parts, optics, and optical components of the TV system, and can solve the problems of large, complex and large devices of the main lens
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Embodiment 1
[0144] figure 1 A schematic cross-sectional view taken along a plane including the central axis 9 showing the basic configuration of the wide-angle imaging device of Embodiment 1 of the present invention. figure 2 is a side view of the essential parts of the device. image 3 is along figure 2 The view from the direction of arrow A in the middle. Figure 4 is a perspective view of the basic parts of the device. figure 1 The wide-angle imaging device includes a refractive optical system 3 , a reflective optical system composed of a first reflective surface 1 and a second reflective surface 2 , and an image forming optical system 5 . The center axis 9 joins the center of curvature of the first reflective surface 1 and the center of curvature of the second reflective surface 2 .
[0145] figure 1 The optical system of the wide-angle imaging device includes a first optical system and a second optical system. For the first optical system, a reflective optical system and an i...
Embodiment 2
[0158] Image 6 with 7 A schematic cross-sectional view taken along a plane including the central axis 9 showing the basic configuration of the wide-angle imaging device of Embodiment 2. In basic configuration, this embodiment and embodiment 1 ( Figure 1 to Figure 5 ) are the same, but differ in that a third reflective surface 61 having a flat reflective surface is provided in the optical path between the image forming optical system 5 and the imaging device 7 .
[0159] exist Image 6 In, the incident light 8a from the outside is refracted by the refractive optical system 3, passes through the light-transmitting portion 2a provided in the second reflective surface 2 and the opening 1a provided in the first reflective surface 1, and is then formed by the image forming optical system 5 is imaged, reflected by the third reflective surface 61 in one direction, and picked up by the imaging device 7. Incident light 8b from the outside is continuously reflected by the convex su...
Embodiment 3
[0163] Figure 9 A schematic cross-sectional view taken along a plane including the central axis 9 showing the basic configuration of the wide-angle imaging device in Embodiment 3. In basic configuration, this embodiment and embodiment 1 ( Figure 1~5 ) are the same, but the difference is that the third reflective surface is curved.
[0164] exist Figure 9 In, the incident light 8a from the outside is refracted by the refractive optical system 3, passes through the light-transmitting portion 2a provided in the second reflective surface 2 and the opening 1a provided in the first reflective surface 1, and then is formed by the image forming optical system 5 is imaged, reflected in one direction by the third reflective surface 91 having a reflective curved surface, further imaged by the image forming optical system 5, and picked up by the imaging device 7. Incident light 8b from the outside is continuously reflected by the convex surface of the first reflective surface 1 and ...
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