Optical detection device for judging relative position of reference object or light source
A detection device and relative position technology, applied in measuring devices, using re-radiation, re-radiation of electromagnetic waves, etc., can solve the problem of limited structural size, focal length of optical lens, degradation of detection accuracy of optical detection components, and difficulty in design Problems such as light and thin appearance
Active Publication Date: 2018-03-06
PIXART IMAGING INC
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Problems solved by technology
The function of the optical lens is to focus the reflected light and then enter the optical detection element. Therefore, the structural size of the traditional optical distance measuring device is limited by the focal length of the optical lens, and it is difficult to design a light and thin appearance.
In addition, the traditional optical distance measuring device uses an optical lens to focus the reflected light onto the optical detection element. If the distance between the optical distance measuring device and the object to be measured is shorter, the detection accuracy of the optical detection element will be greatly reduced. , so the traditional optical distance measuring device has great room for improvement in appearance design and use function
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[0021] see figure 1 and figure 2 , figure 1 and figure 2 They are schematic structural diagrams of the optical detection device 10 in different usage states according to the first embodiment of the present invention. The optical detection device 10 includes a transparent element 12 , an opaque structure 14 , an optical detection element 16 and a reference object 18 . The light-impermeable structure 14 is located at a predetermined relative position with the light-transmitting element 12 . The opaque structure 14 can be a pre-formed part of the light-transmitting element 12 during the front-end manufacturing process, or an independent component that is installed on the light-transmitting element 12 in a disassembled manner during the back-end assembly process; however, the combination of the two The type is not limited thereto, it depends on the design requirements. The light-transmissive element 12 is located between the optical detection element 16 and the reference ob...
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The invention discloses an optical detection device for judging the relative position of a reference object or a light source according to a reflected light signal generated by a detection light signal sent from the light source and configured to pass through the reference object. The optical detection device comprises a light-transmitting element, at least one opaque structure and an optical detection element. One focal length of the light-transmitting element is greater than a predetermined distance. The opaque structure is arranged at a particular location relative to the light-transmittingelement. The optical detection element is arranged adjacent to the light-transmitting element at an interval of the above predetermined distance. The reflected light signal is projected to one detection surface of the optical detection element through the light-transmitting element. The opaque structure blocks one part of the reflected optical signal, and then a characteristic image is formed onthe detection surface of the optical detection element. According to one parameter of the characteristic image, the relative position of the reference object or the light source is judged.
Description
technical field [0001] The present invention provides an optical detection device, especially an optical detection device that can be used to determine the relative position of a reference object or a light source. Background technique [0002] A traditional optical distance measuring device has a light emitting unit, an optical lens and an optical detection element. The light-emitting unit generates detection light to project on the external object under test, and the reflected light from the reference object is projected onto the optical detection element through the optical lens, and the optical detection element analyzes the parameter changes of the reflected light to determine the relative distance of the object under test relation. The function of the optical lens is to focus the reflected light and then enter the optical detection element. Therefore, the structural size of the traditional optical distance measuring device is limited by the focal length of the optical...
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IPC IPC(8): G01S17/06G01S17/08G01S17/50G01S17/58
CPCG01S17/06G01S17/08G01S17/50G01S17/58
Inventor 锺庆霖林典立
Owner PIXART IMAGING INC