US 2019/0379180 A1 · PROJECTOR OF STRUCTURED LIGHT PATTERN

Abstract

A pattern projector with multiple point light source includes a light source of multiple point source capable of providing plural laser dot light beams in a spherical wave form, a lens element and a diffractive optical element. Plural light dots are arranged to form an arrangement pattern of emitting light dots in a specific regularity. The arrangement pattern of emitting light dots is imaged and multiplied to form plural ones. The neighboring two arrangement patterns of emitting light dots are partially overlapped. Non-regularity without repeat and variety on the overlapped portions can be achieved by DOE design that may adjust different overlapping degrees and ways on the arrangement patterns of emitting light dots in a specific regularity.

Claims17

Dependent claims

A projector of structured light pattern, comprising:

a light source of multiple point source comprising plural emitting light dots arranged to form an arranging pattern of emitting light dots in a specific regularity;
a lens element imaging the arranging pattern of emitting light dots to be projected on a target area;
and
a diffractive optical element duplicating the imaged arranging pattern of emitting light dots into the plural arranging patterns of emitting light dots, wherein any adjacent two of the imaged arranging patterns of emitting light dots are partially overlapped to form an overlapping zone, and by partially overlapping the arranging patterns of emitting light dots in the specific regularity, plural projected light dots within the overlapping zone are in an irregular arrangement.

1 more element

Dependencies are inferred from the claim text.

Projector of structured light pattern

Life of this patent

Projector of structured light pattern

Life of this patent

Abstract

Claims17