Lighting device and lighting method

By using the branch and the diffraction part in the lighting device to divide the light into two parts, and using the first detection part to detect the difference in light quantity to control the light source, the problem of failure of the diffraction optical element in the prior art is solved, and high-precision control of the light source and safety guarantee of the lighting device are achieved.

CN119732175APending Publication Date: 2025-03-28NIDEC PRECISION COMPONENTS CO LTD
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Patent Information

Application Number
CN202380060679.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-08-24
Filing Date
2023-08-02
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art cannot effectively detect damage to part of the openings of the diffraction optical element, etc., which leads to inappropriate control of the light source and poses a risk of hindering the eyes.

Method used

The branch is used to divide the illumination light emitted by the light source into the first illumination light and the second illumination light. A part of the first illumination light is diffracted and reflected by the diffraction part. The first detector detects the light amount of the light, and the control part controls the light source according to the difference in the light amount.

Benefits of technology

The light source control is realized without being affected by external light, and can detect damage to diffraction optical elements with high accuracy, ensure the safety of the lighting device, and suppress power consumption.

✦ Generated by Eureka AI based on patent content.
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Abstract

An illumination device (10) according to one embodiment is provided with: a light source (11) that emits illumination light (L) at a predetermined period; a branching unit (13) that branches the illumination light (L) emitted from the light source (11) into first illumination light (L1) and second illumination light (L2); a diffraction unit (14) that diffracts a portion of the first illumination light (L1) and emits the same to the outside, and reflects the other portion of the first illumination light (L1); a first detection unit (15) that detects the light amount of the arrival light (L4) that arrives through the diffraction unit (14); and a control unit that controls the light source (11) on the basis of the difference between a first light amount of the arrival light (L4) detected by the first detection unit (15) when the light source (11) does not emit the illumination light (L) and a second light amount of the arrival light (L4) detected by the first detection unit (15) when the light source (11) emits the illumination light (L).
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