optical Filter? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 13, 2017, 08:47:24 pm
content: HiI looking for an optical Filter with a 1cm Diameter for my IR Cam.Can someone recommend one from Ebay?Truth the Filter only IR Light should pass and Visible light mostly block out.Thanks

author: jimdeane
author_rank: Regular Contributor
timestamp: July 13, 2017, 10:15:30 pm
content: Depending on the particular wavelength you want to cut off at, one of the common near-IR filters for small format aerial photography is the Kodak Wratten 89b. The 87, 87A/B/C, and 88/A are also useful, depending on where you want the lower wavelength cutoff to be.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 13, 2017, 10:21:16 pm
content: wtf 75 mmI need 5mm to 10mm diameter. It must fit on my small USB Cam Lense.Sorry I dont know which Wavelength the Chip support.

author: jimdeane
author_rank: Regular Contributor
timestamp: July 13, 2017, 11:22:17 pm
content: I have not found it economical to try and buy smaller pieces. But maybe you'll get lucky.Unless you're working with something exotic, the chip is probably a standard CMOS chip. I don't recall the typical upper limit of sensitivity, but a little googling jogs my memory into thinking perhaps they drop off to minimal sensitivity at about 1000nm.I played with this recently to see how much IR my cell phone camera can see.https://twitter.com/jim_deane/status/883175482245603329

author: Someone
author_rank: Super Contributor
timestamp: July 14, 2017, 12:35:18 am
content: Quote from: Lord of nothing on July 13, 2017, 10:21:16 pmIf you're experimenting then just use a standard filter size (or buy the standard filter and cut it down), it will be cheaper than finding something already the ideal size you want.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 14, 2017, 07:58:53 am
content: QuoteYes and the special think is the Cam dont have an IR Filter like the most have.QuoteI have a cheap TP-Link Phone and the cam Sucks. The have an IR Filter in and I dont need to play arround with. If you Phone have an OTG Port you can hangup an USB Cam.QuoteThe Cam is tiny and the Filter is big 75mm vs. 10mm so its impossible to get the Filter secured in front of the Cam.QuoteWhen its Glas it will break?!if found this but its look like to thick for a cam:http://www.ebay.de/itm/RGB-Laser-Filter-Lens-Block-400nm-700nm-Pass-Through-700nm-1100nm-IR-laser-/132218629529?var=&hash=item1ec8d82d99:m:mr7vQ7KjlXiMljNOVxmNmxwor with a bigger size:http://www.ebay.de/itm/34mm-34-mm-Infrared-Infra-Red-IR-Filter-720nm-720-/251705526711?hash=item3a9ad189b7:g:rLUAAOSwdpxUWbnQhttp://www.ebay.de/itm/34mm-720nm-Infrared-Infra-Red-X-ray-IR-Filter-for-Canon-DSLR-Camera-Lens-/401225422211?hash=item5d6ae61583:g:0lcAAOSwu4BVxIQuhttp://www.ebay.de/itm/30mm-30-mm-Infrared-Infra-Red-IR-Filter-950nm-950-/230974826893?hash=item35c72c298d:g:SXgAAOxy7AxSJtaR25mmhttp://www.ebay.de/itm/25mm-25-mm-Infrared-Infra-red-IR-Filter-760nm-760-NEW-/320465795434?hash=item4a9d3ff96a:g:gSoAAMXQLw1RyrOX28mmhttp://www.ebay.de/itm/28mm-28-mm-Infrared-Infra-Red-IR-Filter-720nm-720-/231389606563?hash=item35dfe532a3:g:olUAAOSwYshUZF0Jthe only think who are sucks that the cam is not configurable. i use this cam:http://www.delock.de/produkte/F_1068_Kameras_96371/merkmale.htmlThe say " • Standard SCCB interface (I²C Bus)" but not how to connect with.

author: Urs42
author_rank: Unknown
timestamp: July 16, 2017, 08:25:04 am
content: Not 100% sure, but i think you can try to use black parts from a developed analog film as an IR filter.

author: Lord of nothing
author_rank: Super Contributor
timestamp: July 16, 2017, 09:47:35 am
content: I try and the results are horrible.Does anyone have a idea how to conntect the cam over "Standard SCCB interface (I²C Bus)" ?!