Tag: Lens design
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Infrared Camera Design
Cryogenic (SWIR; 0.7 – 2.5 µm) infrared cameras are specialized. For astronomical purposes thermal radiation from a room-temperature lens would swamp the signal beyond 1.5 µm. To deal with this signal such cameras at low temperatures (say 120 Kelvin). The set of materials that is transmissive to 2.5 µm with *well known* indices of refraction…
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Classical and β Anamorphism in Spectrographs
The anamorphic factor is something that must be understood and manipulated in spectrographs operating off Littrow. I describe the anamorphic factor through a series of videos.
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Canon f/2.0 200-mm ZEMAX model
Based on Japanese Patent J2001, 253050, A, I constructed an approximate optical model for the Canon EF f/2.0L 200-mm lens. I can’t know for sure if this model matches the constructed hardware, but the model is a good starting point. Download the zemax archive file
Nick Konidaris 