Abstract:
In this work some optical attenuators and filters for some wavelengths in the
visible and infrared regions of the electromagnetic spectrum were designed
and fabricated.
The selected materials in this work were Calcium Oxide and Iron (III) Oxide.
By pressing each of those materials with Potassium Bromide using a classic
pressing machine, different disks were produced.
Two groups of disks were produced: group with different thickness of the
CaO. And group two with different thickness of Fe 2O3. The produced disks
were rigid enough to be dealt with.
Using a photodetector accompanied with digital multimeter, the incident and
transmitted laser intensity for each disk were recorded and plotted.
The absorption coefficient and the transmission spectrum were determined for
the wavelengths: [(532), (632.8), (675), (810), (820), (940) and (1064)] nm.
The results showed that the CaO disks can be used as a filter for the
wavelength 810 nm.
Also the Fe2O3 disks can be used as good monochromatic filters for the
wavelength 1064 nm and as attenuators for the wavelengths 532nm and
632.8 nm.
