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Rainer Winkler edited this page Jan 21, 2016 · 4 revisions

This is a system for an low cost optical spectrograph. A prototype is actually working but not yet fully documentated here. It is also not planned to put the first design, which is a wooden box with prism, entrance slit and linear CCD here. Instead a new design consisting of a 3D printed case shall be given.

The sensor is actually a ILX554B linear CCD, but as Sony stoped the production it will be later replaced by a different sensor (Maybe the TCD1205DG by Toshiba). The CCD is read by an ATMega8 microprocessor. Using an serial interface it is connected to a computer (USB to serial interfaces do work). A Java program utilizes the RXTX package to connect to the device.

Main components are:

  1. Board to connect linear CCD - posted here in a simple form (scan of sketch and pictures)

  2. Board with ATMega 8 - posted here in a simple form (scan of sketch and pictures)

  3. C programm for the ATMega 8 - posted here

  4. Java programm on the computer - posted here

  5. Case for the linear CCD - case for prism and slit missing, case for CCD with lense (Linear camera) available as openSCAD file. This can be adjusted and used to export an stl file. This might be printed with black PLA. The lense is for instance an Astromedia No 564.OAL Achromatic lens, coated, Diameter: 50.0 mm, Focal length: +182.8 mm (http://astromediashop.co.uk/Components.html), my piece has actually 51.0 mm diameter so I enlarged the opening a bit.

  6. Case for a prism - not yet posted here

  7. Case for a slit and lensing - not yet posted here

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