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VOB Eco Series

VOB++ Sample: Prism Spectrograph 2



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    A typical line spectrum of a prism spectrograph can be produced by image synthesis. The entrance slit is simulated by a bitmap (Fig 3-5a) at the object plane of the system. The resulting spectrum is shown in figure 3-5b and the corresponding energy spectrum in figure 3-5c.

Fig. 3-5a: Bitmap of entrance slit of prism spectrograph (object) Fig. 3-5b: Image of entrance slit of prism spectrograph (false colors) Fig. 3-5b: Energy spectrum

The upper example (Fig 3-5) is made disregarding the features of the detector. VOB++ and VOB pro obtain electro-optical features. Several detector and scanner types (electronical and mechanical) can be simulated. In fig. 3-6 a matrix detector is shown, like a CCD array used in TV cameras. Due to the comparatively coarse matrix the resulting spectrum (Fig. 3-7b, c) shows typical structures, which affect the resolution of the spectrograph.
Fig. 3-6: Image of matrix detector with diode size of 0.10 * 0.10 and center to center distance of 0.15 * 0.15 (arbitrary units)

Fig. 3-7a: Bitmap of entrance slit of prism spectrograph (object) Fig. 3-7b: Image of entrance slit of prism spectrograph as sampled by matrix detector of Fig. 3-6 (false colors) Fig. 3-7b: Energy spectrum as sampled by matrix detector of Fig. 3-6

More samples?
The trial version of VOB Pro with Micro Optics plug-in contains hundreds of samples covering nearly any application of optical design programs. Use these samples as starting points for own designs.

See the Feature Table for a summary of features supported in each edition.

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