# US 2014/0192406 A1 · Laser scanning microscope having an illumination array

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- Number: US 2014/0192406 A1
- Document ID: US20140192406A1
- Status: Published application
- Kind: A1
- Application number: 14/127,544
- Filed: 2012-07-31
- Published: 2014-07-10
- Earliest claimed: 2011-08-06
- Assignees: Carl Zeiss Microscopy GmbH
- Inventors: Wolfgang Bathe
- Web page: https://patentgrep.com/patent/US20140192406A1

## CPC

- G02B 21/0032: {Optical details of illumination, e.g. light-sources, pinholes, beam splitters, slits, fibers (G02B21/0036 - G02B21/008; means for illumination of specimens in general G02B21/06)}
- G02B 21/002: {Scanning microscopes (scanning near field optical microscopes G01Q60/18)}
- G02B 21/004: {fixed arrays, e.g. switchable aperture arrays}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The invention relates to a laser scanning microscope (LSM), consisting of at least one light source, from which an illumination beam path in the direction of a sample originates, at least one detection beam path for passing sample light, preferably fluorescence light, onto a detector arrangement, it main colour separator for separating the illumination and detection beam paths, a microlens array for generating a light source grid composed of at least two light sources, a scanner for generating a relative movement between the illumination light and the sample in at least one direction, and a microscope objective, wherein the lens array is arranged in at common part of illumination and detection beam paths.

## Claims

### Claim 1

A laser scanning microscope (LSM) comprising:
at least one light source from which an illuminating beam path originates in the direction of a sample;
at least one detection beam path for passing sample light onto a detector arrangement;
a main color separator for separating the illumination and detection beam paths;
a microlens array for generating a light source grid comprising at least two light sources;
a scanner for generating a relative movement between the illumination light and the sample in at least one direction; and
a microscope objective lens,
wherein the microlens array is arranged in a common part of the illumination and detection beam paths.

### Claim 2 (depends on 1)

The laser scanning microscope according to claim 1, wherein the microlens array is arranged between the main color separator and the scanner.

### Claim 3 (depends on 1)

The laser scanning microscope according to claim 1,
wherein optics for generating an expanded light beam comprising a plurality of lenses of the microlens array in cross-section are situated upstream of the microlens array in the illumination direction.

### Claim 4 (depends on 1)

The laser scanning microscope according to claim 1,
wherein transfer optics for transferring the illumination points generated by the mini-lenses from the expanded light beam via the scanner and scanning optics to an intermediate image are provided upstream of the microscope objective lens.

### Claim 5 (depends on 1)

The laser scanning microscope according to claim 1,
wherein in the detection direction, the individual beams of sample light generated by the illumination grid by at least one of excitation, scattering and reflection and collimated by the microlens array are focused via a pinhole optic in a single pinhole.

### Claim 6 (depends on 1)

The laser scanning microscope according to claim 1,
wherein in the detection direction, the individual beams collimated by the microlens array are focused individually via a second lens assembly individually onto pinholes of a pinhole array.

### Claim 7 (depends on 5)

The laser scanning microscope according to claim 5,
wherein a detector assembly which assigns a detector to each individual beam is situated downstream of the pinhole.

### Claim 8 (depends on 6)

The laser scanning microscope according to claim 6,
wherein a third lens assembly for generating collimated individual beams that strike the individual lenses of the microlens array is provided upstream of the pinhole array.

### Claim 9 (depends on 8)

The laser scanning microscope according to claim 8,
wherein the third lens assembly consists of two lens grids which generate a telescopic beam path of individual beams.

### Claim 10 (depends on 1)

The laser scanning microscope according to claim 1,
wherein in illumination, a switch-over unit for switching between single-point illumination and multi-point illumination is provided.

### Claim 11 (depends on 1)

The laser scanning microscope according to claim 1,
wherein the sample light is fluorescent light.

### Claim 12 (depends on 8)

The laser scanning microscope according to claim 8,
wherein the third lens assembly for generating collimated individual beams that strike the individual lenses of the lens array is provided upstream of the main color separator in the direction of illumination.