Blue lens prevents glare?

[ResQTech]

Read a little about some spotlights that use blue lenses to reduce glare. Anyone know anything about this? Does that mean if I have one of these and shine it through my windshield from inside, I wont have any glare back?

 

[ResQTech]

Here's the company I was referring to:
http://www.optronicsinc.com/spotlights.htm

 

[cheesehead]

I'd think you'd technically get less glare than a yellow light, but still nothing more useful. Yellow lights supposedly work better in mist, fog and snow, so I can't figure out if blue lights have any significant advantage.

 

[phyhsuts]

Blue light is scattered more than red, so any glare is worse with blue light. However the eye is less sensitive to blue than it is to green or yellow, thus the brightness of blue light of the same intensity (in terms of power per steradiant) is much lower. Less visual glare. The fact that the light emitted by the incandescent filament has a low blue content also cuts down on the intensity of the scattered light. However to cut glare it would be more effective to shield the filament so no direct light from the filament is emitted. Only the narrow beam of reflected light from the reflector should be allowed to escape the spotlight. This is done in some sealed beam lamps. Optronics do use one of these as does Brinkmann. They also add blue and black shields to cut stray light further. Note however that none of these measures reduce light reflecting off the wind screen of the car if you shine the light through it. Only an anti reflection coating on the glass will help here (as is done on eye glasses).

 

[AilSnail]

I had thought of using some kind of fixture and a sheet metal disc in front of the bulb in the lightforce, but it might be easier to paint the bulb tip opaque? Any idea what kind of paint could be used?

 

[Sway]

MTFD17,

I don't know what color lights LEO's , Fire and Emergency use in your state but be very careful shining any light from inside a vehicle it could land you in the cross bars motel for an evening, you may already know this.

I though of getting a blue lens for the Blitz to play with when ever it snows but I would never take it near a car or use it anywhere near the road, that can get you in a “heap of trouble down here” /ubbthreads/images/graemlins/whoopin.gif

Later
Sway

 

[ResQTech]

In NJ, police and EMS use red and blue, FD rigs use red. Ive got blue lights on my car as well as a permit from the NJ DMV to operate these lights. We have one of those "blue eye" spotlights on our ambulance but have never seen it in use or used it. I was wondering if anyone had any experience with them. Ill guess ill just have to try it out myself one night! Thanks for the warning tho Sway!

 

[Ginseng]

Do a search on "optronics" and "blue" in this forum. Several months back, one CPF'er bought one and was terribly disappointed.

Wilkey

 

[phyhsuts]

AilSnail- No paint can take the high temperature of the quatz bulb of the lamp. It may also cause the quatz bulb to crack. The shielding on lamps are usually some ceramic that is fired on during manufacture. If you can figure out a way to mount a metal cup on the mica disc that holds the G6.35 socket of the lamp, then you will have a Light Force with much less spill light than the atandard item. The difficulty is that the opening of the reflector is very small so the size of the cup will have to be small to pass through this opening. It may not then be large enough to prevent direct light from the filament to radiate out of the spotlight.