Filters

last modified 10-09-2010 18:46

Interferential filters

Interferential filters (IF) are band pass filters with a narrow transmission window at a given wavelength.

1/2-inch IF filters

We have 4 boxes of 0.5" interferential filters covering 297 to 950 nm (bandwidth 10nm), except for the 780-890 nm region. They are primarily aimed for TCSPC experiments but can be used for any other purpose at the Cryobench thanks to a 1"->1/2" converter.

Available filters of this type (bandwidth 10 nm):
297, 430, 440, 450, 460, 470, 480, 490, 500, 510, 520, 530, 540, 550, 560, 570, 580, 590, 600, 610, 620, 630, 640, 650, 660, 670, 680, 690, 700, 710, 720, 730, 740, 750, 760, 770, 900, 950

1-inch IF filters

We also have one box of 1-inch interferential filters covering 322 to 750 nm with, described in the table below.

type	size	wavelength	bandwidth
interference	1" circular	322 nm
interference	1" circular	339 nm	16 nm
interference	1" circular	348.5 nm	16 nm
interference	1" circular	350 nm
interference	1" circular	455 nm	40 nm
interference	1" circular	502 nm	46 nm
interference	1" circular	505 nm	71 nm
interference	1" circular	599 nm	70 nm
interference	1" circular	601 nm	70 nm
interference	1" circular	750 nm
interference	1" circular	??? nm

type	size	wavelength	bandwidth
interference	50 mm square	401 nm	390-415 nm, 40%

Band pass filters

Only light within a given range of wavelengths is transmitted.

type	size	wavelengths
band pass	1" circular	385-450 nm
band pass	1" circular	440-510 nm
band pass	1" circular	220-400 nm long pass 680 nm

type	size	wavelengths
band pass	50 mm square	280-360 nm
band pass	50 mm square	300-380 nm
band pass	50 mm square	350-650 nm
band pass	50 mm square	480-550 nm

Long pass filters

Long pass (LP) filters transmit only light above a given wavelength. They are generally used to absorb the reflection of an excitation laser.
We have LP filters covering the range 280-665 nm, as described in the following table.

type	size	wavelength
long pass	1" circular	270 nm
long pass	1" circular	280 nm
long pass	1" circular	315 nm
long pass	1" circular	340 nm
long pass	1" circular	350 nm
long pass	1" circular	375 nm
long pass	1" circular	395 nm
long pass	1" circular	420 nm
long pass	1" circular	435 nm
long pass	1" circular (broken)	435 nm
long pass	1" circular	450 nm
long pass	1" circular	500 nm
long pass	1" circular	550 nm
long pass	1" circular	680 nm / 220-400 nm (??)

type	size	wavelength
long pass	50 mm square	550 nm
long pass	50 mm square	665 nm

Neutral filters

1-inch neutral (metal-silica) filters

We have one box of 1" circular neutral metallic-silica filters for the UV-visible range, with the following ODs:
0.03, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.5, 2.0

1-inch neutral filters

We also have big (50 mm) square or 1" circular neutral-fumed OD filters, as described in the following table.

type	size	OD
gray	50 mm square	1% transmission
gray	50 mm square	5% transmission
gray	50 mm square	10% transmission
gray	50 mm square	30% transmission
gray	50 mm square	60% transmission
gray	50 mm square	80% transmission

type	size	OD
gray	1" circular	OD 0.1
gray	1" circular	OD 0.4
gray	1" circular	OD 1.0
gray	1" circular	OD 2.0
gray	1" circular	OD 2.0
gray	1" circular	OD 3.0
gray	1" circular	OD 4.0
gray	1" circular	OD 1.6 @1060nm
gray	1" circular	OD 2.3 @1060nm