Optical fingerprint collector
A fingerprint collector and optical technology, which is applied in the fields of instruments, medical science, character and pattern recognition, etc., can solve the problems of optical fingerprint collectors such as difficulty in reducing the volume, prolonging the optical path, and increasing the size of the system, so as to reduce the size and avoid Interference, the effect of ensuring uniformity
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Embodiment 1
[0020] Embodiment one: see attached figure 2 As shown, an optical fingerprint collection instrument includes a light source 1, a light source reflector 2, a right-angle prism 4, an imaging reflector 5, an objective lens 6, an image sensor 7 and a housing 8, the right-angle prism 4 is an isosceles right-angle prism, Its imaging surface 9 is located at the opening of one side of the housing 8, the middle of the housing 8 is provided with a baffle 10, the baffle 10 is parallel to the imaging surface 9 of the prism 4, and the light source reflector 2 is fixedly connected to the baffle 10 , the angle between the normal direction of the imaging mirror 5 and the direction of the outgoing light is 157.5°.
[0021] In this embodiment, the image sensor 7 is a CMOS chip, and the angle between the CMOS chip and the optical axis of the objective lens is 83°.
Embodiment 2
[0022] Embodiment 2: An optical fingerprint collection instrument, comprising a light source 1, a light source reflector 2, a right-angle prism 4, an imaging reflector 5, an objective lens 6, an image sensor 7 and a housing 8, and the right-angle prism 4 is an isosceles right-angle prism , the imaging surface 9 is located at the opening of one side of the casing 8, the middle part of the casing 8 is provided with a baffle 10, the baffle 10 is parallel to the imaging surface 9 of the prism 4, and the light source reflector 2 is fixedly connected to the baffle 10 Above, the included angle between the normal direction of the imaging mirror and the outgoing light direction is 152°.
[0023] In this embodiment, the image sensor 7 is a CMOS chip, and the angle between the CMOS chip and the optical axis of the objective lens is 86°.
Embodiment 3
[0024] Embodiment 3: An optical fingerprint collection instrument, comprising a light source 1, a light source reflector 2, a right-angle prism 4, an imaging reflector 5, an objective lens 6, an image sensor 7 and a housing 8, and the right-angle prism 4 is an isosceles right-angle prism , the imaging surface 9 is located at the opening of one side of the casing 8, the middle part of the casing 8 is provided with a baffle 10, the baffle 10 is parallel to the imaging surface 9 of the prism 4, and the light source reflector 2 is fixedly connected to the baffle 10 Above, the angle between the normal direction of the imaging mirror and the direction of the outgoing light is 160°.
[0025] In this embodiment, the image sensor 7 is a CCD sensor, and the angle between the plane of the CCD sensor and the optical axis of the objective lens is 81°.
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