When the infrared carbon rod light source IRSi207 (whose details are provided in the attachment) was converted into parallel light using a 4-inch off-axis parabolic mirror, it was observed that the light spot was initially parallel, but after a distance of approximately 30 cm, it began to diverge and was no longer perfectly parallel. Could someone with experience in setting up FTIR equipment please let me know if this is a normal occurrence or if anyone has any better suggestions? The images of the light spots are attached. They are the initial light spot image and the schematic diagram of the light spot at 30 cm.Upload failed. Please use a supported file and try again.IRSi207.pdf
When the infrared carbon rod light source IRSi207 (whose details are provided in the attachment) was converted into parallel light using a 4-inch off-axis parabolic mirror, it was observed that the light spot was initially parallel, but after a distance of approximately 30 cm, it began to diverge and was no longer perfectly parallel. Could someone with experience in setting up FTIR equipment please let me know if this is a normal occurrence or if anyone has any better suggestions? The images of the light spots are attached. They are the initial light spot image and the schematic diagram of the light spot at 30 cm.Upload failed. Please use a supported file and try again.
IRSi207.pdf
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