Red laptop screens?

[Dennis]

Hi Rajah

No worries, there was nothing in your post to offend, you asked a good question. Light pollution by laptops and all the modern digital gadgets can be a serious problem at astrocamps so everyone who uses these devices has a responsibility not to impact the eyeballers who visit these dark sites to get away from light pollution and use their 'scope visually.

When I started astronomy 10 years ago, there were no computers or ccds and observing paddocks were really dark. In contrast today, it is not uncommon to see a sea of blinking red LEDs and the glow of numerous digital devices which in spite of their night vision mode, add unwanted light if not carefully shielded.

Cheers

Dennis

[mojo (Terry)]

If you're wondering how much red is emitted from your LCD screen relative to other colours, you could always take a picture of your screen and look at the histogram of the RGB channels. If someone has a red filter over their screen, you can compare it against that as a matter of interest.
There's an experiment that could go onto the website.

But i'm sure if you changed your theme to RED and lowered the brightness, it would do the job.

[RAJAH235]

Hi Terry, In the previous post I said that Neil had tried both of his red screen progs. I forgot to mention that he also had tried turning the screen brightness down. He still 'glowed' slightly. I think it's because the laptop is still emitting in the visible light spectrum. I would tend to agree with the *red perspex/lexan over the screen* after Sat. nights session, as the better way to stop the 'white' glow.
Also, after looking at his pics. on screen, I did notice a loss of dark adaption when I returned to my t'scope.
I like your idea of the 'take a before & after pic'. I have a piece of red lexan here. Will try next viewing night & let you know. Anyone else gonna try? L.

[mojo (Terry)]

Originally posted by RAJAH235
I forgot to mention that he also had tried turning the screen brightness down. He still 'glowed' slightly.

He'd come in handy during a blackout

[RAJAH235]

Made reading the Herald-Bobroff easier!!! L.