Endoscope light source device and endoscope
A technology of light source device and endoscope, which is applied in the directions of endoscope, optics, application, etc., can solve the problems of not wide range of light quantity and difficult detection, etc.
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example 1
[0068] Such as Figure 7 and Figure 8 As shown, in the light source device 1A of this modified example, the reflection surface is the scattering surface 90 that scatters and reflects the first reflected light, and the second reflected light is the diffused reflected light.
[0069] The scattering surface 90 is the first region 34A on the inner surface 34SS where the first reflected light directly enters. On the other hand, the optical sensor 40 is disposed outside the optical path of the outgoing light collected by the lens 33, that is, the second region 34B in the inner surface 34SS where the outgoing light collected by the lens 33 does not directly enter, and the second region 34B is connected to the second region 34B. 1. The regions 34A are opposed to each other with the optical axis O in between.
[0070] In addition, even if the reflective surface is a mirror surface, part of the light incident on the reflective surface is emitted as scattered light. That is, strictly...
Deformed example 2、3
[0075] Such as Figure 10 As shown, in the light source device 1B of Modification 2, the optical sensor 40 is arranged in the bottomed recess C34 of the inner surface 34SS of the holder 34 . On the other hand, if Figure 11 and Figure 12 As shown, in the light source device 1C according to Modification 3, the optical sensor 40 is arranged in the through-hole H34 which is a concave portion of the holder 34 .
[0076] The optical sensor 40 disposed in the recess does not detect light around the optical sensor 40 that may be incident from the side.
[0077] In addition, it is more preferable for the photosensor 40 to arrange the light receiving surface 40SA at a position deeper than the opening surface of the inner surface 34SS of the recessed portion C34 or the through hole H34 .
[0078] The optical sensor 40 disposed at a position deeper than the opening surface also reduces light that may be incident from an oblique direction with respect to the light receiving surface 40...
Deformed example 4
[0083] Such as Figure 13 As shown, in the light source device 1D of this modified example, the light absorbing portion 95 that does not reflect light is disposed around the optical sensor 40 . The light absorbing portion 95 is a black chrome plating film, a resin film containing carbon particles, or the like. The light absorbing portion 95 has a reflectance of light having a wavelength of emitted light of preferably 10% or less, particularly preferably 5% or less. The reflectance is the ratio of the light that is reflected without being absorbed / transmitted by the inner surface 34SS among outgoing lights that are perpendicularly incident on the processed surface.
[0084] The optical sensor 40 having the light absorbing portion 95 arranged around it does not detect ambient light incident from the side. Since the incident light is reduced to a light quantity suitable for the optical sensor 40, the light source device 1D can detect the light quantity with high precision.
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