# US 2019/0170964 A1 · Lens holding mechanism and optical emitter

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- Number: US 2019/0170964 A1
- Document ID: US20190170964A1
- Status: Published application
- Kind: A1
- Application number: 16/203,043
- Filed: 2018-11-28
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Mitutoyo Corporation
- Applicants: Mitutoyo Corporation
- Inventors: Yasushi FUKUMOTO
- Web page: https://patentgrep.com/patent/US20190170964A1

## CPC

- G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)}
- F21V 5/00: Refractors for light sources (characterised by cooling arrangements F21V29/504)
- F21V 5/04: of lens shape
- F21V 7/0091: {using total internal reflection}
- F21V 17/06: the fastening being onto or by the lampholder
- F21V 17/12: by screwing
- G02B 7/022: {lens and mount having complementary engagement means, e.g. screw/thread}
- G02B 7/026: {using retaining rings or springs (G02B7/027 takes precedence)}
- G02B 19/0014: {at least one surface having optical power}
- G02B 19/0061: {the light source comprising a LED}
- F21Y 2115/10: Light-emitting diodes [LED]
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A lens holding mechanism includes a lens barrel housing a lens that includes an entrance surface and an exit surface that are separated from each other in an optical axis direction, and a tapering surface, a diameter of which increases from the entrance surface side toward the exit surface side; a first abutting member that abuts, from the exit surface side, the lens housed in the lens barrel, and has an abutting portion that abuts the lens formed along a plane perpendicular to a reference axis of the lens barrel; and a second abutting member that abuts the tapering surface of the lens housed in the lens barrel, has an abutting portion that abuts the lens formed along a circle with a center point on the reference axis of the lens barrel, and holds the lens between the second abutting member and the first abutting member.

## Claims

### Claim 1

A lens holding mechanism comprising:
a lens barrel that houses a lens, the lens including:
an entrance surface and an exit surface that are separated from each other in an optical axis direction, and
a tapering surface, a diameter of which increases from the entrance surface side toward the exit surface side;
a first abutting frame having a first abutting surface that abuts the lens from an exit surface side, the first abutting surface extending along a plane perpendicular to a reference axis of the lens barrel; and
a second abutting frame having a second abutting surface that abuts the tapering surface of the lens, the second abutting surface extending along a circle with a center point on the reference axis of the lens barrel, and the second abutting surface holding the lens between the second abutting frame and the first abutting frame.

### Claim 2 (depends on 1)

The lens holding mechanism according to claim 1, wherein:
the first abutting frame is part of the lens barrel, and
the second abutting frame includes an outer circumferential surface that engages coaxially with an inner circumferential surface of the lens barrel.

### Claim 3 (depends on 1)

The lens holding mechanism according to claim 1, wherein:
the second abutting frame is part of the lens barrel, and
the first abutting frame includes an outer circumferential surface that engages coaxially with an inner circumferential surface of the lens barrel.

### Claim 4

An optical emitter comprising:
a base;
a light emitter attached to the base;
a lens that includes an entrance surface facing a light emitting surface of the light emitter device, an exit surface separated from the entrance surface in an optical axis direction, and a tapering surface, a diameter of the tapering surface increasing from the entrance surface side toward the exit surface side; and
a lens holder comprising:
a lens barrel that houses the lens;
a first abutting frame having a first abutting surface that abuts the lens from the exit surface side, the first abutting surface extending along a plane perpendicular to a reference axis of the lens barrel; and
a second abutting frame having a second abutting surface that abuts the tapering surface of the lens, the second abutting surface extending along a circle with a center point on the reference axis of the lens barrel, and the second abutting surface holding the lens between the second abutting frame and the first abutting frame, wherein:
the lens holder holds the lens and engages coaxially with an engagement surface of the base.

### Claim 5 (depends on 4)

The optical emitter according to claim 4, wherein:
the first abutting frame is part of the lens barrel, and
the second abutting frame includes an outer circumferential surface that engages coaxially with an inner circumferential surface of the lens barrel.

### Claim 6 (depends on 4)

The optical emitter according to claim 4, wherein:
the second abutting frame is part of the lens barrel, and
the first abutting frame includes an outer circumferential surface that engages coaxially with an inner circumferential surface of the lens barrel.