Light-emitting element and distance measuring device
A light-emitting element and optical axis technology, which is applied in the direction of measuring devices, semiconductor laser devices, electrical components, etc., can solve the problems that are not suitable for long-distance measurement
Pending Publication Date: 2022-03-04
SONY SEMICON SOLUTIONS CORP
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Problems solved by technology
However, this ranging method is not suitable for long-distance measurement
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Embodiment Construction
[0098] A ranging device according to an embodiment of the present technology is described.
[0099] [Configuration of distance measuring device]
[0100] figure 1 is a block diagram showing the configuration of the distance measuring device 100 according to the present embodiment. As shown, the ranging device 100 includes a light emitting unit 101 , a light emitting controller 102 , a light receiving unit 103 and a distance measuring calculation section 104 .
[0101] The light emitting unit 101 uses the illumination light L whose brightness changes periodically I to irradiate the measurement target P. When the light emission control signal S is supplied from the light emission controller 102, the light emission unit 101 generates the illumination light L in synchronization with the light emission control signal S. I . The configuration of the light emitting unit 101 will be described later.
[0102] The light emission controller 102 controls light emission of the light ...
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[Problem] To provide a light-emitting element and a distance measuring device that have a vertical-cavity surface-emitting laser structure and are suitable for long-distance light irradiation. [Solution] A light-emitting element pertaining to the present technology is provided with a plurality of light-emitting parts, a first electrode terminal, and a second electrode terminal. The plurality of light-emitting parts are vertical cavity surface-emitting laser elements and are provided with a first electrode and a second electrode, in which the light-emitting parts that emit light when a current flows from the first electrode to the second electrode are arranged in a direction perpendicular to an optical axis of light emitted from the light-emitting parts in a one-dimensional or two-dimensional manner. The first electrode terminal is electrically connected to the first electrode. The second electrode terminal is electrically connected to the second electrode. A resistance of a current path from the first electrode terminal through one of the plurality of light emitting portions to the second electrode terminal is different from a resistance of a current path from the first electrode terminal through another of the plurality of light emitting portions to the second electrode terminal.
Description
technical field [0001] The technology relates to a light emitting element having a vertical cavity surface emitting laser structure and a distance measuring device. Background technique [0002] The time-of-flight (ToF) method is a ranging method. In the TOF method, light is emitted by a light emitter, and light reflected from a measurement target object is detected by a detector. This makes it possible to measure the three-dimensional shape of the measurement target object. [0003] For example, there is known a distance measuring method that includes diffusing light rays respectively emitted from a plurality of light emitters by a diffusion plate, irradiating the diffused light rays onto a measurement target range, and including two-dimensionally arranged The photodetector of the light receiving / transmitting section detects the reflected light. In this distance measuring method, outgoing light is diffused by a diffuser plate. Therefore, short-distance measurements can ...
Claims
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IPC IPC(8): H01S5/42H01S5/183G01S17/08
CPCH01S5/423H01S5/183H01S5/18361G01S17/08G01S7/484H01S5/04256H01S5/0428H01S5/02345H01S5/18311H01S5/18394H01S5/18344H01S5/18391H01S2301/20H01S2301/18G01S7/4815H01S5/18327H01S5/40
Inventor 小林高志若林和弥木村基大岩达矢
Owner SONY SEMICON SOLUTIONS CORP