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Material transmissive to visible light but blocks IR of zappers ?
Or at least translucent to visible. Hopelessly undiscriminating IR encoder &
decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there |
Material transmissive to visible light but blocks IR of zappers?
On 24/05/2012 08:15, N_Cook wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder& decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there IR filter from a camera? -- Adrian C |
Material transmissive to visible light but blocks IR of zappers ?
Sunglasses ?
More realistically, we have all seen those super insulated argon filled windows and doors. Some of them are not totally dependent upon the gas fill for their insulative qualities. Some of them are also metal evaporated or metal sputterred on the glass. This makes them reflect IR, near and far actually as it is to be heat insulator. These doors/windows are quite expensive, but maybe you could find one that is broken and just take the glass you need. Any of the pieces could be large enough. I have seen these and I get the impression that they are like crown glass, which is softer. This depositing of the metal might not work as well on flint type glass. That is just a guess. Hell it could be a film. Tell you what else, I just remembered the name - REFRACTORY. This refers to a furnace. Companies that run or build refractories might have what you need. When they close the door to a furnace and kick it up to a million degrees, they do not need sunburnt eyelids from looking through the glass. Maybe some kilns have something that'll work also, who knows. Well, I just threw a few ideas out there. Might work or not. J |
Material transmissive to visible light but blocks IR of zappers ?
Jeff Urban wrote in message
... Sunglasses ? More realistically, we have all seen those super insulated argon filled windows and doors. Some of them are not totally dependent upon the gas fill for their insulative qualities. Some of them are also metal evaporated or metal sputterred on the glass. This makes them reflect IR, near and far actually as it is to be heat insulator. These doors/windows are quite expensive, but maybe you could find one that is broken and just take the glass you need. Any of the pieces could be large enough. I have seen these and I get the impression that they are like crown glass, which is softer. This depositing of the metal might not work as well on flint type glass. That is just a guess. Hell it could be a film. Tell you what else, I just remembered the name - REFRACTORY. This refers to a furnace. Companies that run or build refractories might have what you need. When they close the door to a furnace and kick it up to a million degrees, they do not need sunburnt eyelids from looking through the glass. Maybe some kilns have something that'll work also, who knows. Well, I just threw a few ideas out there. Might work or not. J I just tried some mylar film , shiney side out but the IR passes and display not really visible in normal light |
Material transmissive to visible light but blocks IR of zappers ?
Tried some PTFE, and a wodge of those antistatic bags, pink and "smoked
glass" types - still searching for non-exotic material |
Material transmissive to visible light but blocks IR of zappers ?
"Adrian C" wrote in message ... On 24/05/2012 08:15, N_Cook wrote: Or at least translucent to visible. Hopelessly undiscriminating IR encoder& decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there IR filter from a camera? -- Adrian C I would second that. Here's a youtube video showing someone removing one from a camera. Not only would you get your filter, you would also get an infra-red camera! (Not one of those heat seeking ones, mind). http://www.youtube.com/watch?v=dvCzbPVXZWk Gareth. |
Material transmissive to visible light but blocks IR of zappers ?
Gareth Magennis wrote in message
... "Adrian C" wrote in message ... On 24/05/2012 08:15, N_Cook wrote: Or at least translucent to visible. Hopelessly undiscriminating IR encoder& decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there IR filter from a camera? -- Adrian C I would second that. Here's a youtube video showing someone removing one from a camera. Not only would you get your filter, you would also get an infra-red camera! (Not one of those heat seeking ones, mind). http://www.youtube.com/watch?v=dvCzbPVXZWk Gareth. The only ones I've seen are no more than 10mm square over a CCD chip I see the "father" of remote controls died this week. |
Material transmissive to visible light but blocks IR of zappers ?
That yellow plastic sheet that was used inside shop windows, that were fully
in the sun, were anti-UV I suppose |
Material transmissive to visible light but blocks IR of zappers?
On 24/05/2012 08:15, N_Cook wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder& decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Mount a permanently lit IR LED near the sensor. Strike it blind ;-) -- Adrian C |
Material transmissive to visible light but blocks IR of zappers ?
N_Cook wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Short pass filters are harder to make than long pass. You might try Edmund Optics. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net |
Material transmissive to visible light but blocks IR of zappers ?
On May 24, 3:54*pm, Phil Hobbs
wrote: N_Cook wrote: Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Short pass filters are harder to make than long pass. *You might try Edmund Optics. Does a "Type A" filter signify anything useful? The price at American Science and Surplus is right: http://www.sciplus.com/category.cfm/...1/category/191 |
Material transmissive to visible light but blocks IR of zappers ?
On May 24, 3:54*pm, Phil Hobbs
wrote: N_Cook wrote: Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Short pass filters are harder to make than long pass. *You might try Edmund Optics. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot nethttp://electrooptical.net I found these people EXPERTS, they used to make all kinds of optical band splitters for us. Also, color correction filters for optic sensors Optical Coating Lab, Inc. 2789 Northpoint Parkway Santa Rosa, CA 95407-7350 707 545 6440 |
Material transmissive to visible light but blocks IR of zappers ?
Does a "Type A" filter signify anything useful?
Not in this case. It either converts daylight film for use with 3200K lighting, or vice-versa. (Such filters normally have a two-digit number starting with 8, followed by a letter.) |
Material transmissive to visible light but blocks IR of zappers ?
N_Cook wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there how about a "hot mirror" photographic filter? they're for old digital cameras that are sensitive to IR. they appear to be some sort of dichroic filter and their color changes depending on what angle you look at them. They look clear straight on. Tiffen made them at some point. |
Material transmissive to visible light but blocks IR of zappers ?
On Thu, 24 May 2012 08:15:46 +0100, "N_Cook" wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there I suppose you could try this: http://apex-window-film-store.com/st...tured_product= mind the wrap ?-) |
Material transmissive to visible light but blocks IR of zappers ?
"N_Cook" wrote:
Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Water. Greg |
Material transmissive to visible light but blocks IR of zappers ?
gregz wrote in message
. ... "N_Cook" wrote: Or at least translucent to visible. Hopelessly undiscriminating IR encoder & decoder on a piece of kit but need to see the LED segment display , which inconveniently has the IR Rx within it. I've tried loads of normal materials like polythene,perspex, glass, mica, silicone rubber. I know black polythene will transmit the IR of PIR units and block visible but there is more seperation of f there Water. Greg I tried that yesterday , using a large jam jar , IR passes but perhaps repeat with something square as the IR may have gone round the water |
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