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===CCD CAMERA SPEC=== Need more wavelengths and less moving parts for successful low-cost biotechnology laboratory. Stanford group<sub>2</sub> uses 0.5 and 1 um amplitude gratings directly above a CCD, they get 1.7 nm bandwidth / pixel. We could use a digital SLR CCD, which we've heard have smaller elements (the paper's CCDs were ~10 um squares). There are a wide variety of amplitude (AKA transmission) gratings available, but a few things still need to be figured out: 1: UV is absorbed by glass and plastic, so we can't build a UV-sensitive devices with a transmission grating unless it is quartz / fused silica. 2: Need to understand the equation relating the grating distance and blaze angle to the zero and first order characteristics of the diffraction. [http://www.optometrics.com/products_gratings_t.html transmission][http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1123 grating][http://search.newport.com/i/1/nav/1/q1/Richardson%2520Gratings/x1/product_brand suppliers] [http://www.lightsmyth.com/products/premium_transmission_gratings/index.php fused silica transmission grating] 1. Germano Veras et al. 2009 "A portable, inexpensive and microcontrolled spectrophotometer based on white LED as light source and CD media as diffraction grid" Talanta 77(3), 1155-115 2. Gaylin M. Lee et al. 1997 "Miniature spectrometers for biochemical analysis" Sensors and Actuators A 58 p. 61-66
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