Cameras FAQs

Here we have provided comprehensive lists of commonly asked questions regarding our scientific cameras. This information is designed to support your inquiries, but if you don’t find the answers you are looking for we encourage you to contact us for further assistance.

Please use the sort buttons in the left navigation to navigate between questions and answers that are specific to Optical Imaging Systems, Optical Filters, Fluidics, Microfluidics, our Webstore and Engineering Partnership.


What is etaloning?

Near infrared light can penetrate 200 or more microns into CCDs. As a result, when CCDs are thinned to 15 microns thick, NIR (especially beyond 800 nm) can penetrate to the back of the CCD and reflect off the back (and again off the front, and again off the back, etc), creating a ring of halos around a bright point source. Deep depletion CCDs have high QE in the NIR, but they also have etaloning. Front-illuminated CCDs have less QE in this region but do not suffer from etaloning.