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Structured Light Lasers

Lasers that transform the familiar laser dot into a wide range of structured light patterns for alignment, inspection and machine vision applications.

Structured Light Application Note

Download this free application note and discover how Structured Light sources that use lasers as the illumination source are governed by the theory of Gaussian beams.

Coherent's world-renowned structured light lasers transform the familiar laser dot into a wide range of structured light patterns including single and multiple laser lines with uniformity down to +/- 1% CV. Straight laser lines are projected by allowing one dimension of light to fan out while maintaining tight control over the other, resulting in a uniform sheet-of-light.

Evenness of the illumination patterns distinguish Coherent's family of structured light lasers from conventional lasers. Coherent's structured light lasers incorporate a patented optical laser line generator that eliminates Gaussian distribution of the light, resulting in the most uniform laser lines on the market. The design provides superior quality light patterns while avoiding the intricacies of installation alignment and detector calibration.

StingRay Structured Light Laser

A new range of diode-based pattern generators for machine vision systems.

StingRay, structure light lasers, coherent

ColdRay Lasers

Compact, thermoelectrically cooled diode laser with wavelengths ranging from 375 nm to 660 nm.

PowerLine Laser

Compact, high-power laser line generator.

Green PowerLine Laser

Thermoelectrically cooled green powerline laser.

Flat Top Projector

Gaussian to flat-top using refractive beam shaping optics.

Magnum II Laser

High power laser line generator designed for industrial applications with high intensity.

Mini Laser

Compact laser line generator and structured light pattern projector.

T-MFL Laser

Micro-focus laser that projects telecentric laser line patterns.

Structured Light Laser Accessories

A variety of accessories for Lasiris line products.

Coherent Structured Light Lasers offer the Machine Vision market the highest quality performance with the proven reliability.

Exceptional line uniformity
Unique beam shaping capabilities
Unmatched power ranges from 1 mW to 7 W
Highest reliability and best industry warranty - 24 months.

Choosing the Right Structured Light Laser
Feature Laser Model	Power (mW)	Wavelength (nm)	Line Pattern	Other Pattern	Temperature Controlled	Circular Beam
StingRay	1-200	520-830
PowerLine	150-2000	375, 405, 445, 670, 810		Upon Demand
Magnum II	500-7000	635, 680, 808, 810		Upon Demand
Mini	1-40`	635-830
ColdRay	5-150	375-830
Green PowerLine	50-150	10 mW to 3W
Green Laser	1-10	532		Upon Demand
T-MFL	100	660
DLS/C	1-150	635-1550

Descriptions	Diode Power (mw)	Wavelength (nm)
POWERLINE LASER Medium power laser line generator High beam pointing stability Operating Temperature: --20°C to +55°C	150-2000	375, 405, 445, 670, 810
MAGNUM II LASER High power laser line generator External monitoring interface Rugged industrial-grade design Key switch & interlock circuit option	500-7000	635, 680, 808, 810
MINI LASER Compact and lightweight 10 mm diameter Wide range of fan angles Two year warranty	1-40	635-830
COLDRAY LASER Excellent wavelength and power stability Thermoelectrically-cooled Extended lifetime	5-150	375-830
GREEN POWERLINE LASER High power, high visibility, high contrast laser External focusing Thermoelectrically-cooled	50-150	532
GREEN LASER High visibility, high contrast laser Stable output power Wide range of fan angles One year warranty	1-10	532

Some Available Patterns

patterns

Typical Dimensions

dimensions

Diffraction Equation

The following equation is used to calculate the diffraction angle of the pattern (lines or dots).

equation

Θ_m is the diffraction angle measured from the center to the mth beam. The interbeam angle is the angle between two neighboring beams (or orders) starting from the central beam (order 0) with the positive orders on one side (+1, +2, +3...) and the negative orders on the other side (-1, -2, -3...). The spreading angle Θ_s between the two outmost beams (or lines, when a line generating lens is added) is twice the angle of the higher order beam.

For example, for a 5-line pattern at 670 nm with a period d=25µm, the spreading angle qs is twice the diffraction angle of the second order beam.

5-line pattern generating diffraction grating

Multiple Dot Patterns

Number of Projected Lines	DOE Period (µm)	Interbeam angle (°)	*Spreading angle (°)
5	25	1.54	6.14
	169	0.23	0.91
	170.6	0.23	0.90
9	338.2	0.11	0.91
9	532	0.07	0.58
11	25.7	1.49	14.94
15	16.4	2.34	32.78
19	50.4	.0.77	13.71
33	100	0.38	12.28
33	426.1	0.09	2.88
99	260	0.15	14.47