| P5841 Optical Filter |  |
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Neutral density, coloured and infrared filter The emission of a white light source (LED 10) will be separated by an optical grating and can be observed on the white screen with scale (2). The beam of the white LED is collimated with the lens (3). In the collimated beam filters (13) will be placed and the change in the spectrum is be observed and detected by the photodiode (9). The reading of the intensity is done by a digital meter which is switched into the µA Mode to obtain a linear relation to the photo current. The change of the spectrum is compared to the provided filter curves. |
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Interference filter An interference filter is an optical filter composed out of multiple layers with different indexes of refraction forming a kind of Fabry Perot cavity however with a much broader transmission bandwidth. The centre wavelength of the interference filter used here (4) is 550 nm with a bandwidth of 10 nm. When the interference filter is tilted with respect to the incidence beam, the transmission peak changes. The filter is placed in front of the collimated white light beam with subsequent optical filters also to check their transmission at 550 nm. |
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| Item | Code | Qty | Description |
| 1 | 2B-0224 | 1 | Mounting plate 40, C25 |
| 2 | 2B-1134 | 1 | Optical screen with XY scale on block |
| 3 | 4B-0040 | 1 | Plano-convex lens f=40 mm, C25 mount |
| 4 | 4B-0500 | 1 | Fabry Perot, C25 mount |
| 5 | 4B-0700 | 1 | Set of 8 optical filters |
| 6 | 4K-T600 | 1 | T - grating 600 l/mm |
| 7 | 4LBX060 | 1 | Biconvex lens f = 60 mm, � 22.4 mm, C25 mount |
| 8 | ED-0010 | 1 | Adaptive power supply APS-05 |
| 9 | ED-0210 | 1 | PIN Photodetector, BPX61 with connection leads |
| 10 | LS-0010 | 1 | LED white in C25 housing |
| 11 | LS-0060 | 1 | LED NIR in C25 housing |
| 12 | MC-0003 | 1 | Profile rail MG-65, 300 mm |
| 13 | MC-0100 | 1 | Screen holder on carrier 20 |
| 14 | TP-0030 | 1 | Digital multimeter 3 1/2 digits |
| 15 | XM-0210 | 1 | Triple swivel unit |
| 16 | XM-1090 | 3 | Mounting plate C25 with carrier 20 mm |
| 17 | XM-1110 | 1 | Adjustment holder, 4 axes, carrier 20 mm |