LVR Optical - Laser & Optical Radiation Safety

LVR have the following blogs available:


Laser Video Projector Safety

As an increasing number of video projectors start to use lasers as their light source, more people have been asking us about the safety implications in using these devices...


UK Laser Display Safety Guidance 2017

Since its publication in 1996, the Health and Safety Executive’s HS(G)95, The Radiation Safety of Lasers for Display Purposes, has been the mainstay of accessible guidance for using lasers in entertainment applications, referenced by users, venue operators, and enforcement bodies alike...


EN 60825-1:2014 ~ What does it mean?

This is a reference that appears frequently when a person is working with laser products, but what exactly does it mean? It is a number that should appear in the product’s sales literature, in the user manual, and on the product itself...


Hazard Distance and Hazard Zone

In this article we are going to talk about the importance of knowing a laser’s hazard distance or, to give it the full name, Nominal Ocular Hazard Distance (NOHD). This is the distance at which direct eye exposure to the beam is considered not to be a risk for accidental exposure; the accidental exposure time being 0.25s...


Laser Product Classification

Any product that uses a laser, and is sold or used in the UK or Europe must meet the criteria for CE declaration, which usually mean that the device must show compliancy with the Laser Product Safety Standard EN 60825-1:2014, which has been adopted across all European member states...


Colour: Differences & Similarities

A rather obvious statement, for of course, red is completely different to green. Likewise, blue differs to pink. The use of dissimilar colours can make objects and scenes appear completely different from an aesthetic perspective. But when considering laser exposure, what difference does colour make from a safety perspective?...


Lighting Product Risk Groups

With the classification scheme for laser products quite well established and known, James writes about how a similar system for non-laser light sources works in an article he wrote for the Entertainment Services & Technology Association (ESTA), (now part of PLASA)...


Laser Effects: Movement and Colour

Falling costs and improvements to the technology used in laser show projectors have enabled the special effect lighting to become far more accessible to users than could have ever been imagined, even just a few years ago. It’s now possible to purchase multi-watt projectors that can be held in one hand, making them very easy to install...


Audience Scanning in the UK : Legal Status

Audience scanning can be an emotive topic and sometimes controversial with polarised views on whether it should be allowed or not, and confusion over the legal status. In this article I’ll explain the current status of using lasers to perform audience scanning at events...


Sharpys and Lasers

Since its introduction in 2010 the Clay Paky Sharpy has grabbed the attention of lighting designers eager to use its distinctive near parallel beam of light for a wide range of production applications. In this time the Sharpy and the effect it produces have become a standard sight at stage and television events...


Laser Pulses; emissions and exposure

This article explains the importance of laser pulses in the context of laser show applications, and is intended to clear up some of the confusion that exists when considering exposure levels. It’s a topic I've decided to write about due to frequent number of times I meet people, many of which are seasoned laser show operators...


Changes to Laser MPE Limits

ICNIRP has published updated guidance for the exposure limits relating to laser radiation. ICNIRP is responsible for periodically reviewing the exposure limits it publishes, which through the acceptance of ongoing research and evidence, can lead to changes in the understanding of how laser light interacts...


Changes Ahead: HS(G)95 The Radiation Safety of Lasers used for Display Purposes

PLASA has now announced that it will be taking ownership of HSE’s guidance notice relating to the use of laser for display purposes, HS(G)95. It should be seen as a positive move for updating the existing guidance, but naturally the announcement has lead to a number of questions being asked by people, which we have tried to answer below...


Laser Show Safety Tips

As part of series on Laser Show Safety Tips, expert James Stewart delves into the whys and wherefores of physical masking, and how this often-neglected tool can be used to good effect to increase show safety assurance, and meet HSG95 requirements. Physical Masking: Why, How and When...


EN 60825-1:2007 - Push The Button

When you buy a laser projector, it will no doubt make a reference to a series numbers ‘60825’, and make some kind of statement that the product ‘complies’ or ‘conforms’ to this safety standard. But what exactly do these numbers mean? And what are the legal implications of the safety standard?...


Safe Laser Exposure for Laser Shows

We are often asked what is a safe amount of laser light to perform audience scanning with, and over the years we have seen rumours of what is safe creep up slowly as the availability of higher power lasers at lower costs has increased. Ten years ago, for instance, rumours were rife that 20mW lasers were ok to crowd scan with...


SAGE / PLASA Lasers in Entertainment Meeting

On the 22nd of September 2011, a meeting was held at Earls Court in London, hosted jointly by the Safety Advisors Group in Entertainment (SAGE) and the Professional Light and Sound Association (PLASA) to discuss a range of topics relating to the safe use of lasers in entertainment...