2
Alpy 600 - Spectroscopy in slit mode
In the previous chapter, you’ve looked at lamp spec-
tra using the Alpy 600. Now, you probably want to
take a picture of what you’ve seen, either to share
it with others, or to make measurements. This is the
purpose of this chapter. Here you will work in slit
mode, with everyday light, working on a bench.
2.1 Configuration for imaging
As explained in section 1.6, compared to visual ob-
servation, we need to add more optics behind the
grating, to create an image at the focal plane (the
CCD surface). These optics are contained in the Alpy
600 body:
The body is threaded, for tuning the distance be-
tween the optics and CCD when it is mounted in the
CCD camera adapter. (The nominal distance is about
19,5mm) . A threaded ring is used to lock the body in
the focused position.
Watch out that the optics do not touch or
damage your camera sensor.
Assemble the CCD camera adapter to your camera:
The camera used here has a T-mount
(M42x0,75mm thread). If you are using a
C-mount camera, an optional C-mount adapter
is available (see appendix 7.1.4).
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