• The Shelyak calibration unit, although designed for the eShel II, is compatible with most fiber-based Echelle spectroscopes.
• The calibration unit utilizes a Thorium-Argon lamp with high voltage power to align and prepare light paths for dispersion. It serves as a baseline for spectral analysis.
• A flat lamp is used in the calibration unit to aid in order geometry and blaze processing, optimizing the performance of the spectrograph.
• An LED light source is included to verify the orders of calibration, ensuring proper functioning and accurate measurements.
• The module can be controlled using Audela software and RS-232, allowing for easy management and adjustment of the injection unit and other components.

While intended for eShell II, this Shelyak calibration unit is compatible with most fibre based Echelle specroscopes. To make sure the light paths are properly aligned and prepared for dispersion, the calibration unit serves as a method to ensure this is done by using a Thorium-Argon lamp (that covers the visible spectrum) with high voltage power to ensure proper alignment of light beams. This essentially functions as a baseline for spectral analysis.

A secondary source of light from the calibration unit is a flat lamp order geometry and blaze processing. Since blaze processing typically refers to how the blaze function is processed in which light is dispersed through grating, it can help fine tune the eShel to make sure measurements are intact. This is absolutely crucial for accurate information to be rendered and processed.

The third source of light is an LED which furthermore verifies the orders of a calibration to ensure the unit is functioning and measuring properly.

Using an RS-232, the module can be controlled via Audela software as well as the mirror of the injection unit.

The image above shows the spectrum for the Thorium-Argon lamp which serves as a blueprint to ensure spectral emissions areas are recorded properly.