# US 9,039,235 B2 · Laser line generating device

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- Number: US 9,039,235 B2
- Document ID: US9039235B2
- Status: Granted
- Kind: B2
- Application number: 14/024,034
- Filed: 2013-09-11
- Published: 2014-03-20
- Granted: 2015-05-26
- Earliest claimed: 2012-09-19
- Assignees: Chervon (HK) Limited
- Applicants: Chervon (HK) Limited
- Inventors: Ping Xu; Ming Chen
- Web page: https://patentgrep.com/patent/US9039235B2

## CPC

- F21V 5/02: of prismatic shape (F21V5/04 takes precedence)
- G01C 5/00: Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels (G01C3/20, G01C3/30 take precedence)
- G01C 15/00: Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C 15/004: {Reference lines, planes or sectors}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S)

## Abstract

A laser line generating device includes a conical prism, a light-emitting unit for projecting light onto the conical prism, a housing for receiving the light-emitting unit and permitting the light emitted by the light-emitting unit to pass there through, and translucent columns disposed between the housing and the conical prism for connecting the housing and the conical prism, wherein the apex of the conical prism faces towards the light-emitting unit.

## Claims

### Claim 1

A laser line generating device, comprising:
a conical prism;
a light-emitting unit for projecting light onto the conical prism;
a housing for carrying the light-emitting unit and permitting light emitted by the light-emitting unit to be passed there through towards the conical prism; and
translucent columns disposed between the housing and the conical prism for connecting the housing and the conical prism, wherein the apex of the conical prism faces towards the light-emitting unit.

### Claim 2 (depends on 1)

The laser line generating device according to claim 1, wherein the translucent columns are symmetrically disposed relative to the center of the conical prism.

### Claim 3 (depends on 1)

The laser line generating device according to claim 1, further comprising a prism holder for supporting the conical prism wherein an entirety of the conical prism and the prism holder is disposed on one side of the housing and connected with the housing by the translucent columns.

### Claim 4 (depends on 3)

The laser line generating device according to claim 3, wherein the prism holder is a cylinder.

### Claim 5 (depends on 4)

The laser line generating device according to claim 4, wherein the housing is a cylinder concentric with the prism holder.

### Claim 6 (depends on 1)

The laser line generating device according to claim 1, wherein the translucent columns are formed of optical glass.

### Claim 7 (depends on 5)

The laser line generating device according to claim 5, wherein the translucent columns are configured as rectangular blocks.

### Claim 8 (depends on 7)

The laser line generating device according to claim 7, wherein a surface with a maximum area of the rectangular blocks of the translucent columns is parallel to the central axis of the conical prism.

### Claim 9 (depends on 7)

The laser line generating device according to claim 7, wherein the translucent columns are located at the edge of the prism holder.

### Claim 10 (depends on 9)

The laser line generating device according to claim 9, wherein the surface with the minimum area of the rectangular blocks of the translucent columns is perpendicular to the central axis of the conical prism.

### Claim 11 (depends on 10)

The laser line generating device according to claim 10, wherein a number of the translucent columns is four.