ILSC 2009 Paper #1301 (Calculating the Laser Safety Hazard for Scanning Systems)

Calculating the Laser Safety Hazard for Scanning Systems
Authors:
Clinton T. Meneely, Goodrich Sensor Systems; Burnsville MN USA
Presented at ILSC 2009

Recently, many optical systems are employing lasers (indoor and outdoor) to sense objects at considerable ranges over large fields of regard. These can involve powerful wide field-of-view flash LIDAR systems or less powerful, very narrow divergence lasers scanned over the field of regard. Despite the fact that Z136.1 does not directly address scanning laser systems directly (except in a few appendices), there are ways to apply the random periodic exposure standards to various types of scanned systems to determine eye safety and hazard ranges. Th...

ILSC 2009 Paper #1304 (Comparative Evaluation of Ocular Hazards from Projectors-Laser and Lamp Projectors)

Comparative Evaluation of Ocular Hazards from Projectors-Laser and Lamp Projectors
Authors:
Karl Bylund, Microvision; Bothell WA USA
David H. Sliney, Consulting Physicist; Fallston MD USA
Michael Beard, Microvision Corporation; Redmond WA USA
Presented at ILSC 2009

Projectors of varying technologies have been in use for several decades in home and office environments. These include 35mm slide projectors, overhead projectors, and more recently digital projectors. The trend in digital projectors has been increasing luminance from smaller products. This has been made possible by the advent of new or improved light sources and projection technologies. Results of a com...

ILSC 2009 Paper #1305 (Scanning Audiences at Laser Shows: Theory and Practice)

Scanning Audiences at Laser Shows: Theory and Practice
Authors:
Patrick Murphy, International Laser Display Assn.; Orlando FL USA
Greg Makhov, Lighting Systems Design Inc.; Orlando FL USA
Presented at ILSC 2009

For more than three decades, the technique of "audience scanning" has been routinely used at laser light shows outside of the United States. Visible beams from CW lasers are projected towards viewers, to put them inside cones, fans and other moving light shapes set to music. Most commonly, accessible irradiance levels have not been measured by operators; instead they have been set by eye to look "OK". Since MPE-level irradiance at the audience is somewhat less bright than de...

ILSC 2009 Paper #1307 (Assessment of LED's Radiation Safety)

Assessment of LED's Radiation Safety
Authors:
Mou Tongsheng, Optical Engineering Department of Zhejiang University; Hangzhou Peoples Republic of China
Yu Jiandong, Zhejiang University Sensing Instruments; Hangzhou Peoples Republic of China
Presented at ILSC 2009

Recent years, LED technology as well as its applications grow very fast, which deserve more attention to the hazard of LED radiation. The spectral integrated radiances are important parameters in hazard analysis of LED radiation. However, traditional spectral luminance meters are not able to be used to determine spectral integrated radiances in accordance with IEC 62471. Therefore, a novel photobiological safety measurement...

ILSC 2009 Paper #1401 (Alignment Eyewear, the LSO's Role)

Alignment Eyewear, the LSO's Role
Authors:
Ken Barat, Lawrence Berkeley National Lab; Berkeley CA USA
Presented at ILSC 2009

There is no direct mention of alignment eyewear in the present Z136.1 Safe Use of Laser-2007 document. The use of alignment eyewear is known by the majority of LSOs for the visualization of visible beams. Especially when one considers the alternative of removing ones eyewear to see the beam. Remote viewing is the superior and safer alternative, but is still not as common as lifting ones eyewear to see the beam. The point of this presentation is by allowing the use of alignment eyewer the LSO is allowing the user to use personnel protective equipment (PPE) that does not lo...

ILSC 2009 Paper #1404 (A Collection of Distinct and Noteworthy Control Measures)

A Collection of Distinct and Noteworthy Control Measures
Authors:
Candace Soles, Coherent, Inc.; Santa Clara CA USA
Cathi Scogin, Sperian Protection; Pleasanton CA USA
Presented at ILSC 2009

When it comes to laser safety, it is often advantageous to think outside the box for maximum impact to laser users and non-laser users. The standard regulations, such as ANSI, OSHA, and IEC, give fine examples of control measures, but they might not always be the best fit for the situation. As lasers gain in popularity because of their increasing sophistication and/or because of their affordability, Laser Safety Officers, out of necessity, are prompted to be creative when implementing control...

ILSC 2009 Paper #1405 (Laser on Time As Safety or Only a Part of Safety?)

Laser on Time As Safety or Only a Part of Safety?
Authors:
Erwin Heberer, -; Heusenstamm Germany
Presented at ILSC 2009

More and more speak of the Risk analyses for the laser plant from the laser on Time as the optimal solution for the judgment of the endurance of Laser guard with high power laser.

The Laser on Time alone is not sufficient s only then one in addition to security component although the interior is controlled so that possible damages of the wall or other components during the duration of one 8 hour shift (DIN/EN of 60825-4 annex B) are captured.

It can result in a production shift through the reflection inessential damages which ones do not fail immediately to the total one...

ILSC 2009 Paper #1406 (Matilda: A Joint UK/US Military Laser Range Clearance Utility Based on Probabilistic Hazard Assessment Techniques)

Matilda: A Joint UK/US Military Laser Range Clearance Utility Based on Probabilistic Hazard Assessment Techniques
Authors:
Brian Flemming, Selex Galileo; Edinburgh Great Britain
Presented at ILSC 2009

The MATILDA utility is a joint venture between the United States Air Force (USAF) and the United Kingdom Ministry of Defence (UK MOD). Its purpose is to provide a means of assessing laser irradiation risks to unprotected persons from military laser training operations in uncontrolled outdoor environments, and is based on the UK probabilistic laser hazard assessment technique. It is intended that this new common facility will become a standard tool for undertaking laser hazard assessments for mil...

ILSC 2009 Paper #1501 (In the Safety Limbo: Simultaneous Illumination and Optical Wireless Communications with Light-emitting Diodes)

In the Safety Limbo: Simultaneous Illumination and Optical Wireless Communications with Light-emitting Diodes
Authors:
Werner Horak, Siemens AG; Munich Germany
Joachim Walewski, Siemens AG; Munich Germany
Presented at ILSC 2009

The high-speed modulation capabilities of white light-emitting LEDs offer a unique combination of illumination and simultaneous free-room data transmission and therewith a series of new and promising applications. However, the optical radiation safety requirements for this dual-use of LEDs are currently separately provided with two different standards: free-space optical communication with LEDs is (still) covered by the application-related part of the laser-...

ILSC 2009 Paper #1502 (Total on Time Pulse Method for Evaluating the Hazards from Pulsed Lasers)

Total on Time Pulse Method for Evaluating the Hazards from Pulsed Lasers
Authors:
Wesley Marshall, US Army CHPPM; Gunpowder MD USA
Presented at ILSC 2009

Although the total on time pulse (TOTP) method has been successfully used to compute the maximum permissible exposure for repeated exposure to laser energy, some modification to the method must be made when the pulse duration is short and the pulse energies vary from pulse to pulse. Alternative methods to TOTP are presented for pulses of varying energy as well as a modification to the TOTP method that will provide a more accurate assessment of the hazards.