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Laser Safety

1 - 3

The laser controller is a multi-functional interface which provide

feedback, status, and control of the laser, in addition to the safety

features, to comply with end-use applications. The controller also

provides interface to the laser for remote connection of power,

modulation, and communication. Features include:

1. Power to the Laser

2. Modulation to the laser via the BNC connector

3. USB interface to the laser for communication and parameter

setting

4. Visible indication of the laser status

For information on how to install a laser controller into your

Coherent StingRay laser system, refer to the Coherent StingRay

Laser Safety and Installation Quick Start Guide (1223125) that

shipped with your product.

Laser Safety and

Classification

Lasers are classified based upon the output power and the wave-

length of a laser beam in a particular setup according to the United

States Center for Devices & Radiological Health (CDRH) document

21 CFR 1040.10 and upon demand, to the International Electrotech-

nical Commission (IEC) document 60825-1:2

edition, 2007-03.

The protocol for classification described herein is a general outline

of the procedures. In actual practice, the settings can differ

depending on the laser. Call us for details.

The laser beam (either as a raw or modified beam) is aimed into a

7 mm aperture located some distance away from the laser. The

sensor placed just behind the aperture records the highest output

power level of the laser beam—see Table 1-1 (p. 1-4) for details. In

the case of a line laser, the entire line is scanned to find the highest

output power.

With conventional Gaussian line generators, it is generally the hot

central spot that causes its safety rating to go up one class (from

CDRH Class II to IIIa, for example). Our optics produce a line of

uniform intensity that does not have a hot spot at the center. There-

fore, a Coherent StingRay non-Gaussian laser offers a safer level of

exposure, in addition to more light and uniform illumination trans-

mitted to your part.

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