Standard Operating Procedure
Thermo Scientific GeneSys-20 Spectrophotometer

Introduction

The Genesys-20 Spectrophotometer, combined with custom Windows software, provides a simple tool to analyze photonic filters and other optical devices. The unit may be also be used manually (from the front panel controls) to quickly scan for peaks.

Genesys-20 Spectrophotometer

Manual (Front Panel) Usage

To use the unit, power it on and wait until self-calibration is complete and the unit becomes ready (about 5 minutes). Press the A/T/C button to select % Transmission on the display.

Readings may now be taken as follows:

The above procedure (beginning with selecting wavelength) must be repeated for each reading required. Start taking readings across the entire spectrum at 25 nm apart then take more readings at 5 nm intervals around the peak transmission (to precisely determine center wavelength for the filter). As well, take readings near the half-maximum point to allow a precise determination of the FWHM of the filter.

GenSys20 Controls GenSys20 Filter Holder

The Genesys-20 Controls (including wavelength selector, ZERO button, and units selection) as well as the filter holder for the unit with a dielectric filter installed.

Software Usage

Custom Windows software allows automated scanning of the transmission curve of an optical filter in the range 365nm to 100nm inclusive and is the preferred mode of operation.

To use the unit, power it on and wait until self-calibration is complete and the unit becomes ready (about 5 minutes).

Start the program on the PC (via an icon on the desktop).

GenSys20 Software

A screen shot of the Genesys-20 software as it acquires data on a filter.



Technical Note: The program accepts a single argument (e.g. "/3") on the command line. This selects the COM port to use. If no arguments are specified, the default is COM1. A CMD batch file is the easiest way to include this argument is required.