# US 9,519,150 B2 · Method for optimizing an intensity of a useful light distribution

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- Number: US 9,519,150 B2
- Document ID: US9519150B2
- Status: Granted
- Kind: B2
- Application number: 14/449,642
- Filed: 2014-08-01
- Published: 2015-02-05
- Granted: 2016-12-13
- Earliest claimed: 2013-08-01
- Assignees: JENOPTIK Optical Systems GmbH
- Applicants: JENOPTIK Optical Systems GmbH
- Inventors: Chris Schild; Tobias Graf
- Web page: https://patentgrep.com/patent/US9519150B2

## CPC

- G02B 27/0927: {Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat}
- H01S 3/2383: {Parallel arrangements}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

## Abstract

A method for optimizing an intensity of a useful light distribution includes: providing a light source for emitting a light beam in a z-direction, which defines an optical axis, with a first intensity distribution; providing a beam shaping optical unit and a beam focusing optical unit for generating a second intensity distribution to be used in a target plane, the target plane being inclined by an angle ALPHA relative to a focal plane determined by the beam focusing optical unit; determining a first intensity at a first point and a second intensity at a second point of the second intensity distribution to be used. The points P1 and P2 are arranged on different sides of the back focal plane; and displacing the beam shaping optical unit along the y-axis in such a way that the difference between the two intensities I1 and I2 lies within a predefinable limit.

## Claims

### Claim 1

A method for optimizing an intensity of a useful light distribution comprising:
providing a light source for emitting a light beam in a z-direction, which defines an optical axis, with a first intensity distribution;
providing a beam shaping optical unit and a beam focusing optical unit, which are arranged substantially perpendicularly to the z-direction in an x-y plane spanned by an x-direction and a y-direction, for generating a second intensity distribution to be used in a target plane, the target plane being inclined by an angle ALPHA relative to a back focal plane determined by the beam focusing optical unit;
determining a first intensity of the second intensity distribution at a first point of the second intensity distribution and a second intensity of the second intensity distribution at a second point of the second intensity distribution to be used, the first point and the second point being arranged on different sides of the back focal plane; and
displacing the beam shaping optical unit along a y-axis such that a difference between the first and second intensity lies within a predefinable limit.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the beam shaping optical unit is a diffractive or refractive optical unit.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the first intensity distribution is a Gaussian distribution and the second intensity distribution is a top hat distribution.