Optics
Optical Systems
Free Space Isolators
E-O Devices
Spherical Singlets
Multi-Element
Lenses
Cylindrical Lenses
Aspheric Lenses
Mirrors
Diffusers
& Lens Arrays
Windows
Laser Line Filters
These bandpass (BP) filters provide one of the simplest and most
economical ways to transmit a well-defined wavelength band of
light, while rejecting other unwanted radiation. Their design is
essentially that of a thin film Fabry-Perot Interferometer formed by
vacuum deposition techniques and consists of two reflecting stacks,
separated by an even-order spacer layer.
These reflecting stacks are constructed from alternating layers of
high and low refractive index materials, which can have a
reflectance in excess of 99.99%. By varying the thickness of the
spacer layer and/or the number of reflecting layers, the central
wavelength and bandwidth of the filter can be altered. This type of
filter displays very high transmission in the bandpass region, but
the spectral range of blocked light on either side of the bandpass
region is narrow. To compensate for this deficiency, an additional
blocking component is added, which is either an all dielectric or a
metal-dielectric depending on the requirements of the filter.
Although this additional blocking component will eliminate any
unwanted out-of-band radiation, it also reduces the filter's overall
transmission throughput.
Using these methods, Thorlabs is capable of offering a wide range
of BP filters from 340nm - 1650nm. In addition, custom BP
filters can be fabricated; please contact our technical support staff
to discuss your particular requirements.
Specifications
Prisms
Gratings
Polarization Optics
Beamsplitters
Filters
& Attenuators
Gas Cells
■
■
■
Laser Line Filters
ITEM#
FL350-10
FL355-10
FL441.6-10
FL457.9-10
FL460-10
FL488-1
FL488-3
FL488-10
FL508.5-10
FL514.5-1
FL514.5-3
FL514.5-10
FL532.-1
FL532-3
FL532-10
FL543.5-10
FL632.8-1
FL632.8-3
FL632.8-10
FL635-10
FL647.1-10
FL670-10
FL694.3-10
FL730-10
FL780-10
FL830-10
FL850-10
FL880-10
FL880-40
FL880-70
FL905-10
FL905-25
FL1064-3
FL1064-10
FL1152-10
FL1300-30
FL1550-12
FL1550-30
FL1550-40
LASER
LINE
XeF
Nd:YAG
HeCd
Argon
Argon
Argon
Argon
Argon
Argon
Argon
Argon
Argon
Argon
Argon
Nd:YAG
HeNe
HeNe
HeNe
HeNe
Diode
Krypton
Diode
Ruby
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Nd:YAG
Nd:YAG
HeNe
Diode
Diode
Diode
Diode
CWL
1
(nm)
350 ± 2
355 ± 2
441.6 ± 2
457.9 ± 2
460 ± 0.2
488 ± 0.2
488 ± 0.6
488 ± 2
508.5 ± 2
514.5 ± 0.2
514.5 ± 0.6
514.5 ± 2
532. ± 0.2
532 ± 0.6
532 ± 2
543.5 ± 2
632.8 ± 0.2
632.8 ± 0.6
632.8 ± 2
635 ± 2
647.1 ± 2
670 ± 2
694.3 ± 2
730 ± 2
780 ± 2
830 ± 2
850 ± 2
880 ± 2
880 ± 8
880 ± 10
905 ± 2
905 ± 5
1064 ± 0.6
1064 ± 2
1152 ± 2
1300 ± 6
1550 ± 2.5
1550 ± 6
1550 ± 8
FWHM
2
(nm)
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
1 ± 0.2
3 ± 0.6
10 ± 2
10 ± 2
1 ± 0.2
3 ± 0.6
10 ± 2
1 ± 0.2
3 ± 0.6
10 ± 2
10 ± 2
1 ± 0.2
3 ± 0.6
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
10 ± 2
40 ± 8
70 ± 8
10 ± 2
25 ± 5
3 ± 0.6
10 ± 2
10 ± 2
30 ± 6
12 ± 2.3
30 ± 6
40 ± 8
3) Transmission
■
T
3
MIN (%)
25
25
60
65
65
40
45
65
65
45
55
65
40
60
70
70
50
65
70
70
70
70
70
70
70
70
70
70
70
70
70
70
55
70
45
45
40
45
45
BLOCKING:
≥OD
4 MIN.
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-1150nm
200-3000nm
200-3000nm
200-1850nm
200-1850nm
200-1850nm
PRICE
CODE
C
C
C
C
C
G
F
C
C
G
F
C
G
F
C
C
G
F
C
C
C
C
C
C
C
C
C
C
C
C
C
C
G
C
C
C
C
C
C
■
■
■
■
Minimum Clear Aperture:
Ø21mm (1" OD, See Drawing)
Thickness:
<6.3mm
Optimum Operating Temperature:
23°C
Edge Treatment:
Mounted in Black
Anodized Aluminum Ring
Edge Markings:
CWL-FWHM
↑
Lot Number
(The Arrow Points in the Direction
of the Light Transmission)
Surface/Coating Quality:
80-50 Scratch-Dig Per MIL-0-13830A
Operating Temperature:
-50°C to +80°C
Substrates:
Schott Borofloat
and Soda Lime
Black Anodized
Aluminum Outer
Housing
Clear Aperature
Max
PRICE
CODE
A
B
C
D
E
F
G
$
$
$
$
$
$
$
$
82.20
84.20
88.60
95.70
126.90
129.80
198.80
£
£
£
£
£
£
£
£
51.80
53.00
55.80
60.30
79.90
81.80
125.20
€
€
€
€
€
€
€
€
76,40
78,30
82,40
89,00
118,00
120,70
184,90
RMB
¥
785.00
¥
804.10
¥
846.10
¥
913.90
¥ 1,211.90
¥ 1,239.60
¥ 1,898.50
1) Central Wavelength 2) Full Width at Half Maximum
842
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