I think that the scattering property of the diffusing panel is the key safety factor.

With regards
Harry Moseley

-----Original Message-----
From: British Medical Laser Association [mailto:[log in to unmask]] On Behalf Of Williamson Matt
Sent: 07 January 2014 10:59
To: [log in to unmask]
Subject: Re: Vistamatic blinds

Linda
I too checked the manuf specs several years ago. The VLT makes them un acceptable for most situations as you have found out.
There are a few solutions of blinds with signs on that work well. Some are inside the viewing cavity of the window for good infection control, or on the outside.

Matt
Matt Williamson, clinical physics, 01924 541640 07768 987956

----- Original Message -----
From: Helen Amatiello [mailto:[log in to unmask]]
Sent: Tuesday, January 07, 2014 10:44 AM GMT Standard Time
To: [log in to unmask] <[log in to unmask]>
Subject: Vistamatic blinds

Dear Mailbase

I wondered what fellow LPA's take on the use of Vistamatic blinds were please?
These are sandblasted frosted glass panels that seem to be very popular for use in theatres and other locations.

I have made some rudimentary transmission checks on samples and they seem to have ~80% transmission in 280 to 800nm range that we are able to test. I do not think that this takes any account of any diffusion of the source that the sandblasting may have though.

Do LPA's use these in their locations? And if so, are other control measures put in place?

Many thanks for your responses in advance,

regards

Helen Amatiello
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