Recent content by andrey o

fenix-store
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    Spotlight for firemen

    Yes, that's a great flashlight, widely used in Russia too. When designing my analogue, I just decided to add a powerful floodlight: LS-CT65M flashlight. By the way, do you actually use blue taillight LEDs? Is it really needed?
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    Spotlight for firemen

    LEP technology seems to be a great solution, but now it is too expensive. Need to wait when it becomes a more massive product, hopefully LEP modules will be available for a cheaper price. I'll try to find more information about TIR lens of Acebeam L19. For firefighter chest flashlight it is...
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    Spotlight for firemen

    By the way, I have also tried a catadioptric lens (I had very high expectations on it): http://www.mtnelectronics.com/index.php?route=product/product&product_id=762 Partly it provides a similar effect as in the Pelican StealthLight: light from LED reflects from the lens' central part and goes...
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    Spotlight for firemen

    Yes, you are right, that I will face cooling issues. If the LED is attached to the body, then the whole body helps to dissipate heat. If the LED is raised, then there should be some special solution for cooling. Some diving flashlights with side-oriented LEDs have a metal thermal conductor going...
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    Spotlight for firemen

    Yes, you are right about this Survivors' smoke cutter, the black one reduces flood light to 30-50%, and it reduces hot spot intensity very slightly. However a significant flood light is still present. Frankly, I am rather skeptical regarding using TIR lens for hot spot LED light. TIR lenses...
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    Spotlight for firemen

    If I understand correctly, Cree High Intensity LEDs are flat domed. Now I don't have to de-dome LED, as Cree provides flat domed LED series (Cree XP-L High Intensity, Cree XQ-E high intensity)
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    Spotlight for firemen

    What I have done in order to remove flood light around hot spot: 1. Use LED with the smallest light emitting area 2. Use Fresnel lens 3. Use some tricks to eliminate parasitic reflections: - black matter color of reflector (it should not reflect light, it should just hide wires) - special...
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    Spotlight for firemen

    My goal is to eliminate this flood around hot spot. If the flashlight is used in smoky conditions, this flood light impairs visibility
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    Spotlight for firemen

    Thanks, Cree XP-P looks really great, I will check all of these, and I will also ask for advice on http://forum.fonarevka.ru/ As for long-range beam, yes, you are right, there are many situations when you need a wide beam instead. But I decided to solve this by a separate high power LED with its...
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    Spotlight for firemen

    XQ-E HI, yes (not HD). I have also tested XD16, and I haven't achieved better results. It can consume a higher current (2A instead of 1A) but it doesn't provide a double light output. So I decided to use XQ-E HI for smaller flashlights (www.sila-s.com/ls-a2) and XP-L HI for bigger chest...
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    Spotlight for firemen

    There are some research showing that blue light performs worse (https://en.wikipedia.org/wiki/Selective_yellow) in smoky environments, so some believe that yellow light works better in a smoke (so do I :))
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    Spotlight for firemen

    Thanks for replies. As for the smallest and flat top LED, I have used Cree XQ-E - it works really fine, however its efficacy (128 lm/W) is quite low comparing to modern LEDs. I will check Noctigon K1. Has anybody seen flashlights using a set of lenses instead of a single lens or reflector...
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    Spotlight for firemen

    Hello, I'm from Russia and I design flashlights for firemen. My aim is to make a flashlight with the narrowest spot (maximize its throw), and minimize its flood, as the flood is useless in smoke. As this flashlight is supposed to be a chest firefighter's flashlight, it should be quite compact...
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