Astronomy/UVBRI filters

from Andover

Andover Corporation now offers two sets of astronomy/ UBVRI filters—the Johnson/Bessel and the Kron/Cousins types—as standard items. These wideband filters isolate and measure large specific bands of light emitted by astronomical objects. Both types have the same ultraviolet, blue and visible filters but different red and infrared filters. The Johnson/Bessel type is better suited for use with a photomultiplier tube, while the Kron/Cousins type is better suited for use with a Silicon CCD.

Features
Options for professionals and amateurs alike
Ideal for photometric calibration
General specifications
Size Tolerance+0/-0.25 mm
Glass Thickness5.0 mm +/-0.1 mm
BevelsBreak all sharp edges
Coating DurabilityPer MIL-C-48497A moderate abrasion
ConstructionSchott glass substrates (ground and polished) laminated with index-matching epoxy
Optical Specifications
Transmitted Wavefront1/4 wave or better per 25 mm
Parallelism30 arc seconds or better
Surface Quality60/40 or better per MIL-C-675
Optical QualityImage Quality
AR CoatingsExterior surfaces (appropriate to the filter passband)
Johnson/Bessel Filter SpecificationsUltravioletBlueVisibleRedInfrared
Nominal CW/L365nm440nm520nm630nm900 nm
Nominal FWHM60 nm100nm90 nm120nm300 nm
Nominal Transmission> 50%>55%> 70%>70%>70%
Kron/Cousins Filter SpecificationsUltravioletBlueVisibleRedInfrared
Nominal CW/L365 nm440nm520nm760nm800 nm
Nominal FWHM60 nm100nm90 nm250nm150 nm
Nominal Transmission> 50%>55%>70%>70%>70%

Johnson/Bessel UBVRI Filters

Size, Shape, Part Number & Type
Type25 mm Ø50 mm Ø50 mm SQ(Mounted)
31 mm Ø
(Mounted)
50 mm Ø
Ultraviolet
Blue
Visible
Red
Infrared
JOHN-U-25
JOHN-B-25
JOHN-V-25
JOHN-R-25
JOHN-I-25
JOHN-U-50
JOHN-B-50
JOHN-V-50
JOHN-R-50
JOHN-I-50
JOHN-U-50S
JOHN-B-50S
JOHN-V-50S
JOHN-R-50S
JOHN-I-50S
JOHN-U-31M
JOHN-B-31M
JOHN-V-31M
JOHN-R-31M
JOHN-I-31M
JOHN-U-50M
JOHN-B-50M
JOHN-V-50M
JOHN-R-50M
JOHN-I-50M
5 Piece SetsJOHN-FA-25JOHN-FA-50JOHN-FA-50SJOHN-FA-31MJOHN-FA-50M

Kron/Cousins UBVRI Filters

Size, Shape, Part Number & Type
Type25 mm Ø50 mm Ø50 mm SQ(Mounted)
31 mm Ø
(Mounted)
50 mm Ø
Ultraviolet
Blue
Visible
Red
Infrared
KRON-U-25
KRON-B-25
KRON-V-25
KRON-R-25
KRON-I-25
KRON-U-50
KRON-B-50
KRON-V-50
KRON-R-50
KRON-I-50
KRON-U-50S
KRON-B-50S
KRON-V-50S
KRON-R-50S
KRON-I-50S
KRON-U-31M
KRON-B-31M
KRON-V-31M
KRON-R-31M
KRON-I-31M
KRON-U-50M
KRON-B-50M
KRON-V-50M
KRON-R-50M
KRON-I-50M
5 Piece SetsKRON-FA-25KRON-FA-50KRON-FA-50SKRON-FA-31MKRON-FA-50M

Kontakt

Weitere Informationen anfordern
Produkt Manager - Optik
+49 6151 8806-56
Fax: +49 6151 8806956

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