Lenses

Universal optical element of most optical systems. The traditional use of lenses is binoculars, telescopes, optical sights, theodolites, microscopes, photo and video equipment.

Lens is an optical part of a transparent homogeneous material, having two refractive polished surfaces. The optical characteristics of the lens are determined by the curvature of its surfaces and the material from which it is made.

As the material for lens manufacturing we use mineral optical glass of various types, salt crystals (KCl).

Shapes:

convexo-convex
plano-convex
convex-concave (positive and negative meniscus)
double-concave
plano-concave
aspherical

Technical specifications

Diameter, mm	From Ø 3 to 250
Diameter tolerance	f 7
Center thikness tolerances, mm	From ± 0,03
Surface accuracy	N=2 ∆N=0,3
Surface quality	In accordance with GOST 11141
Decentering	0,003
Chamfers	min. 0,1
Clear aperture (working aperture)	90 – 98%
Focal length, mm	From 3 to ∞
Coating	Ref. to our coating catalog (page 14)

Optical Vacuum Coatings

Coating	Substrate	Type of component (lens, cemented lenses, prism, cemented prisms, plane-parallel plates)	Spectrum characteristics of the coatings	Overall dimensions, mm
1	2	3	4	5
AR coating
1.Single wave coating. The coating provides antireflection for a single wavelength.	Optical glasses with a refractive index n_е from 1,44 to 1, 8138	Lenses, plates, wedges, prisms	– R ≤ 0,3 % for λ = 550 nm – R ≤ 0,3 % for λ = 632,8 nm – R ≤ 0,3 % for λ = 650 nm – R ≤ 0,3 % for λ = 720 nm – R ≤ 0,3 % for λ = 808 nm – R ≤ 0,3 % for λ = 860 nm – R ≤ 0,3 % for λ = 1060 nm – R ≤ 0,3 % for λ = 1064 nm – R ≤ 0,3 % for λ = 1540 nm	Lenses: from Ø 5 mm to Ø 80 mm. Plates, wedges: – from Ø 5 mm to Ø 80 mm; – from 8х8 mm to 70х70 mm. Prism types АР-90°, АР-0°, БР-180°, БС-0°, АкР-90°, БП-90°: Size of the sides – from 7х7 mm to 40х40 mm. Diameter from 3 mm to 8 mm, length from 50 mm to 80 mm.
2. Multiwave and broadband antireflection. The coating provides antireflection for two or more wavelengths.	Optical glasses with a refractive index nе from 1,44 to 1, 8138 К8, silica KGW	Lenses, plates, wedges, prisms Active elements	– R_ср_.≤ 0,5 % for ∆λ = (420 – 700) nm – R_ср_.≤ 0,5 % for ∆λ = (650 – 1000) nm. – R_А ≤ 0,8 %. – R_λ ≤ 0,5 % for λ=755 nm and λ=1064 nm – R_λ ≤ 1 % for λ = 1064 nm – R_λ ≤ 0,5 % for λ = 1351 nm – R_λ ≤ 0,5 % for λ = 1538 nm
High-reflection coating
1. Metal-dielectric coatings	К8	Plates, prisms	– R_λ ≥ 99 % for λ = 1064 nm – R_λ ≥ 96 % for λ = 1067 nm, α = 45°. – R_λ ≥ 96 % for λ = 1067 nm, α = 48°. – R_λ ≥ 96% for ∆λ=(600–700)nm, α = 45°. – R_λ ≥ 96 % for λ = 632,8 nm – R_λср_. ≥ 93 % for ∆λ = (480 – 650) nm – R_А ≥ 90 %, α = 45°.	Plates: – from Ø 5mm to Ø 80 mm; – from 8х8 mm to 70х70 mm. Prism types АР-90°, Ар-0°, БР-180°, БС-0°, АкР-90°, БП-90°: Size of the sides – from 7х7 mm to 40х40 mm.
2. Dielectric coatings	К8	Lenses, prisms, plates	– R_λ ≥ 96 % for λ = 632,8 nm – R_λ ≥ 90 % for ∆λ = (640 – 690) nm – R_λ ≥ 90 % for λ = (500 – 550) nm – R_λ ≥99% for λ=755nm and for λ=1064 nm – R_λ ≥ (95 ± 1) % for λ = 1064 nm – R_λ ≥ 99 % for λ = 1064 nm
Beam-splitting coating
1. For unpolarized radiation	К8 К8 К8	Prisms (measured on glued prisms at the angle of incidence of radiation α = 45 ° to the hypotenuse) Lenses, plates (measured R at an angle of incidence of radiation α = 8°, measured T at an angle of incidence of radiation α = 0°) Plates (measured at the angle of incidence of radiation α = 45°)	– Т = (50 ± 5) % for λ = 540 nm – Т = (47 ± 3) % for λ = (530 ± 30) nm – Т = (50 ± 5) % for λ = 680 nm – Т_ср_. = (70 ± 5) % for ∆λ = (400–750) nm – Т = (86 – 90) % for λ = (540 ± 10) nm – Т_ср_. = (28 – 35) % for ∆λ = (420–820) nm – Т_ср_. ≥ 70 % for ∆λ = (475 – 625) nm Т ≤ 30 % for λ = 1064 nm – R_λ = (10 ± 3) % λ = 1060 nm – R_λ = (25 ± 5) % for λ = 1060 nm – R_λ ≤ 10 % for λ = 560 nm, R_λ ≥ 70 % for λ = 660 nm – Т_∆_λ_. ≥ 75 % for ∆λ = (420 – 615) nm, Т ≤ 30 % for λ = 650 – 670 nm – R_∆_λ_. ≤ 15 % for ∆λ = (400 – 550) nm, R ≥ 85 % for ∆λ = 630 – 670 nm – Т_∆_λ_. ≤ 10 % for ∆λ = (600 – 700) nm, Т ≥ 94 % for λ = 1067 nm	Prism types АР-90: Size of the sides -from 7х7 mm to 40х40 mm. Lenses: from Ø 5m to Ø 80 mm. Plates: – from Ø 5 mm to Ø 80 mm; – from 8х8 mm to 70х70 mm. Plates: – from Ø 5 mm to Ø 80 mm; – from 8х8 mm to 70х70 mm.
2. For polarized radiation	К8 ТК121 К8 К8 К8	Prisms (measured on glued prisms at the angle of incidence of radiation α = 45° ° to the hypotenuse) Prisms (measured on glued prisms at the angle of incidence of radiation α = 48°57′ ° to the hypotenuse) Prisms (measured on glued prisms at the angle of incidence of radiation α = 34°50′ ° to the hypotenuse) Prisms (measured at the angle of incidence of radiation α = 45°)	– Rs/Ts = 2 ÷ 4 for λ = 633 nm – Rs/Ts = 0,6 ÷ 1 for λ = 633 nm – Rs/Ts = 0,8 ÷ 2 for λ = 633 nm – Тр ≥ 90 % and Ts ≤ 2 % for ∆λ = (900 ± 25) nm – Тs = (45 – 56) % for λ = 633 nm – Тs = (63 – 70) % for λ = 633 nm – Тр = (51 ± 5) % and Ts = (48 ± 5) % for λ = 633 nm	Prism types АР-90: Size of the sides -from 7х7 mm to 40х40 mm. Prism types АР-90: Size of the sides – от 7х7 mm to 40х40 mm. Prism types АР-90: Size of the sides -от 7х7 mm to 40х40 mm. Prism types АР-90: Size of the sides – от 7х7 mm to 40х40 mm. Plates: – from Ø 5 mm to Ø 80 mm; – from 8х8 mm to 70х70 mm.

Lenses

Certificated

Technical specifications

Optical Vacuum Coatings

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