DIFFRACTIVE OPTICAL ASSEMBLY, LASER PROJECTION UNIT, AND DEPTH CAMERA
First Claim
1. A diffractive optical assembly, comprising:
- a sealing assembly comprising a first sealing plate, a second sealing plate and a spacer, the first sealing plate and the second sealing plate being light transparent and arranged opposite to each other, the spacer spacing the first sealing plate and the second sealing plate apart, the first sealing plate, the second sealing plate, and the spacer cooperatively defining a closed receiving cavity; and
a diffractive optical element accommodated in the receiving cavity and comprising a light-transparent diffractive body and a diffractive structure formed on the diffractive body.
1 Assignment
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Accused Products
Abstract
Disclosed are a diffractive optical assembly, a laser projection unit, and a depth camera. The diffractive optical assembly includes a sealing assembly and a diffractive optical element. The sealing assembly includes a light transparent first sealing plate, a light transparent second sealing plate, and a spacer. The first sealing plate and the second sealing plate are arranged opposite to each other. The spacers spaces the first sealing plate and the second sealing plate apart. The first sealing plate, the second sealing plate and the spacer cooperatively defines a closed receiving cavity. The diffractive optical element is accommodated in the receiving cavity. The diffractive optical element includes a light transparent diffractive body and a diffractive structure formed on the diffractive body.
3 Citations
20 Claims
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1. A diffractive optical assembly, comprising:
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a sealing assembly comprising a first sealing plate, a second sealing plate and a spacer, the first sealing plate and the second sealing plate being light transparent and arranged opposite to each other, the spacer spacing the first sealing plate and the second sealing plate apart, the first sealing plate, the second sealing plate, and the spacer cooperatively defining a closed receiving cavity; and a diffractive optical element accommodated in the receiving cavity and comprising a light-transparent diffractive body and a diffractive structure formed on the diffractive body. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A laser projection unit, comprising:
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a substrate assembly; a lens barrel assembly provided to the substrate assembly and defining an accommodating cavity together with the substrate assembly; a light source provided to the substrate assembly and received in the accommodating cavity; a collimating element accommodated in the accommodating cavity; and a diffractive optical assembly accommodated in the accommodating cavity; wherein the diffractive optical assembly comprises; a sealing assembly comprising a first sealing plate, a second sealing plate and a spacer, the first sealing plate and the second sealing plate being light transparent and arranged opposite to each other, the spacer spacing the first sealing plate and the second sealing plate apart, the first sealing plate, the second sealing plate, and the spacer cooperatively defining a closed receiving cavity; and a diffractive optical element accommodated in the receiving cavity and comprising a light-transparent diffractive body and a diffractive structure formed on the diffractive body; wherein the collimating element, the first sealing plate, the diffractive optical element and the second sealing plate are arranged in an optical path of the light source sequentially. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A depth camera, comprising:
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a laser projection unit comprising; a substrate assembly; a lens barrel assembly provided to the substrate assembly and defining an accommodating cavity together with the substrate assembly; a light source provided to the substrate assembly and received in the accommodating cavity; a collimating element accommodated in the accommodating cavity; and a diffractive optical assembly accommodated in the accommodating cavity; wherein the diffractive optical assembly comprises; a sealing assembly comprising a first sealing plate, a second sealing plate and a spacer, the first sealing plate and the second sealing plate being light transparent and arranged opposite to each other, the spacer spacing the first sealing plate and the second sealing plate apart, the first sealing plate, the second sealing plate, and the spacer cooperatively defining a closed receiving cavity; and a diffractive optical element accommodated in the receiving cavity and comprising a light-transparent diffractive body and a diffractive structure formed on the diffractive body; wherein the collimating element, the first sealing plate, the diffractive optical element and the second sealing plate are arranged in an optical path of the light source sequentially; an image acquirer configured to acquire a laser pattern projected to a target space after passing through the diffractive optical element; and a processor connected to the laser projection unit and the image acquirer separately and configured to process the laser pattern so as to obtain a depth image.
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Specification