Filtres Astronomie / UBVRI
AndoverAndover Corporation propose désormais deux types de filtres Astronomie / UBVRI - les types Johnson/Bessel et Kron/Cousins comme produit standard. Ces filtres à large bande isolent et mesurent de larges bandes spécifiques de lumière émises par les objets de l’observation des astres.
Ces deux filtres ont les mêmes filtres ultraviolets, bleus et visibles mais des filtres rouges et infrarouges différents. Le type Johnson/Bessel est mieux adapté pour une utilisation avec un tube photomultiplicateur, tandis que le type Kron/Cousins est mieux approprié pour une utilisation avec un CCD au silicium.
Caractéristiques techniques
| General specifications | |
|---|---|
| Size Tolerance | +0/-0.25 mm |
| Glass Thickness | 5.0 mm +/-0.1 mm |
| Bevels | Break all sharp edges |
| Coating Durability | Per MIL-C-48497A moderate abrasion |
| Construction | Schott glass substrates (ground and polished) laminated with index-matching epoxy |
| Optical Specifications | |
| Transmitted Wavefront | 1/4 wave or better per 25 mm |
| Parallelism | 30 arc seconds or better |
| Surface Quality | 60/40 or better per MIL-C-675 |
| Optical Quality | Image Quality |
| AR Coatings | Exterior surfaces (appropriate to the filter passband) |
| Johnson/Bessel Filter Specifications | Ultraviolet | Blue | Visible | Red | Infrared |
|---|---|---|---|---|---|
| Nominal CW/L | 365nm | 440nm | 520nm | 630nm | 900 nm |
| Nominal FWHM | 60 nm | 100nm | 90 nm | 120nm | 300 nm |
| Nominal Transmission | > 50% | >55% | > 70% | >70% | >70% |
| Kron/Cousins Filter Specifications | Ultraviolet | Blue | Visible | Red | Infrared |
|---|---|---|---|---|---|
| Nominal CW/L | 365 nm | 440nm | 520nm | 760nm | 800 nm |
| Nominal FWHM | 60 nm | 100nm | 90 nm | 250nm | 150 nm |
| Nominal Transmission | > 50% | >55% | >70% | >70% | >70% |
Johnson/Bessel UBVRI Filters
| Size, Shape, Part Number & Type | |||||
|---|---|---|---|---|---|
| Type | 25 mm Ø | 50 mm Ø | 50 mm SQ | (Mounted) | (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 Sets | JOHN-FA-25 | JOHN-FA-50 | JOHN-FA-50S | JOHN-FA-31M | JOHN-FA-50M |
Kron/Cousins UBVRI Filters
| Size, Shape, Part Number & Type | |||||
|---|---|---|---|---|---|
| Type | 25 mm Ø | 50 mm Ø | 50 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 Sets | KRON-FA-25 | KRON-FA-50 | KRON-FA-50S | KRON-FA-31M | KRON-FA-50M |
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Quantum Design S.A.R.L.
Avenue de l’Atlantique
Bâtiment Fuji Yama
91940 Les Ulis
France
| Tél. : | 01 69 19 49 49 |
| Email : | franceqd-europe.com |
