Elliptical flat mirrors

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Grouped product items
SKU	Specifications	Stock Qty	Price
9011621	Clear Aperture: >90 Dimensions tolerance, mm: ±0.1 Major axis, mm: 28 Material: N-BK7 or equivalent Metallic coating on S1: Metallic R > 97% @ 620 - 680 nm, AOI = 45 ±20° Minor axis, mm: 20 Opticus comment: missing productID ref S1 Surface quality, S-D: 80-50 S2 Surface quality, S-D: 80-50 Thickness tolerance, mm: ±0.15 Thickness, mm: 2 Wedge / Parallelism error: < 30 arcsec	4	€60.00
9350475	Clear Aperture: >90 Dimensions tolerance, mm: (+0/-0.1) Major axis, mm: 35.92 Material: BK7 Metallic coating on S1: UV enhanced Aluminum Ravg > 85 % @ 250 nm - 600 nm Minor axis, mm: 25.4 S1 Flatness, PV: <λ/8 @ 632.8 nm S1 Surface quality, S-D: 60-40 S2 Surface quality, S-D: 60-40 Thickness tolerance, mm: ±0.1 Thickness, mm: 5 Wedge / Parallelism error: <30 arcsec	20	€51.00
9539123	Clear Aperture: >90 Coatings: Protected Silver Ravg > 96% @ 550 nm - IR Major axis, mm: 53.88 (+0/-0.1) Material: BK7 Minor axis, mm: 38.1 (+0/-0.1) Parallelism error: <30 arcsec Opticus comment: missing productID ref Protective chamfers: <0.25 mm x 45° Surface quality, S-D: 40-20 Thickness, mm: 10.0 (±0.1)	3	€75.00

Details

When the maximum possible clear aperture is required, the best choice is elliptical flat mirrors. Due to unique geometry of substrate, the aperture becomes circular when mirror is rotated by 45˚ around the minor axis. The most common aluminum coating features a fair reflection in UV, visible and mid - IR wavelength ranges. Protected silver coatings assures the highest reflectivity of all metal coated mirrors in the visible wavelength range. Protected gold is the most efficient coating over the entire IR range. However, if higher reflectivity is needed, the best choice is dielectric coated elliptical mirrors.

Broad band protected metallic coatings
Dielectric HR coatings are available
Paralellism <30 arcsec
Circular clear aperture