LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

Material: N-BK7/S-LAH64
High Transmittance in the 400-700 nm Visible Light Range
Large Numerical Aperture, Wide Aperture, Lower F/#, Smaller Spherical Aberration
Suitable for Small Field-of-view Applications such as Fiber Optic Light Sources

LBTEK precision polished aspheric lenses are commonly available in two materials: N-BK7 and S-LAH64. Both materials exhibit high transmittance in the visible and near-infrared wavelength ranges. S-LAH64 has a higher refractive index than N-BK7, making it typically suitable for manufacturing high numerical aperture (NA) short focal length lenses. Compared to conventional spherical lenses, aspheric lenses feature larger numerical apertures (NA), lower f-numbers (f/#), and reduced spherical aberration, enabling diffraction-limited performance with superior optical characteristics. This allows for fewer system components, thereby simplifying optical system design. When compared to molded aspheric condenser lenses, precision polished aspheric lenses offer larger sizes, better surface quality, and improved beam quality. Due to the off-axis performance limitations of aspheric lenses, these precision polished aspheric lenses are more suitable for small field-of-view applications such as fiber optic light sources, including fiber collimation, coupling, and imaging. For optimal performance: - When collimating a point source, the beam should be incident on the flatter surface of the lens. - When focusing a collimated beam, the beam should be incident on the more curved surface.

Attribute

Operating Wavelength400 nm-700 nm

MaterialN-BK7/S-LAH64

DiameterØ12.7 mm，Ø18.0 mm，Ø25.4 mm，Ø50.8 mm

Clear Aperture>90% CA

Design wavelength780 nm

Focal length tolerance±1 %

Diameter tolerance+0.0/-0.1 mm

Thickness tolerance±0.1 mm

Chamfer0.2 mm，45 °

<0.5 um

Surface Power±7.5 um

Surface irregularity3 Fringes (RMS)

λ/4

Surface finish (scratches/pits)60/40

Eccentricity<3 arcmin

Anti-reflective coatingRavg<0.5 %@400 nm-700 nm (6° AOI，single surface)

Precision Polished Aspheric Lens, N-BK7, AR Coating: 400 nm-700 nm, Unmounted

Material: N-BK7
Working Wavelength: 400 nm-700 nm
Diameter: Ø12.7 mm, Ø25.4 mm, Ø50.8 mm

LBTEK Unmounted Precision Polished Aspheric Lenses, made of N-BK7 material, with anti-reflection coating: 400 nm-700 nm. Currently available in three sizes: Ø12.7 mm, Ø25.4 mm, and Ø50.8 mm. The spherical refraction of ordinary lenses cannot converge parallel light to a single point, resulting in spherical aberration. In contrast, the curvature of aspheric lenses continuously changes from the center to the edge. By adjusting the conic constant and aspheric coefficients, spherical aberration can be minimized, allowing light to converge to a single point and thereby improving optical performance.

LBTEK Uninstalled precision polished aspheric lens can be mounted on fixed lens mounts

Product Model	Diameter	Focal length	Numerical Aperture	Unit Price	Lead Time
AC1909-A	12.7 mm	25.0 mm	0.22	$223.31	Contact
AC1610-A	25.4 mm	50.0 mm	0.22	$266.84	Contact
AC1811-A	50.8 mm	100.0 mm	0.22	$462.82	Contact

Precision Polished Aspheric Lens, S-LAH64, AR Coating: 400 nm-700 nm, Unmounted

Material: S-LAH64
Working Wavelength: 400 nm-700 nm
Diameter: Ø12.7 mm, Ø18.0 mm, Ø25.4 mm, Ø50.8 mm

LBTEK Unmounted Precision Polished Aspheric Lenses, S-LAH64 material, AR coating: 400 nm-700 nm, currently available in four sizes: Ø12.7 mm, Ø18.0 mm, Ø25.4 mm, Ø50.8 mm. The spherical refraction of ordinary lenses cannot converge parallel light to a single point, resulting in spherical aberration. In contrast, the curvature of aspheric lenses changes continuously from the center to the edge. By adjusting the conic constant and aspheric coefficients, spherical aberration can be minimized, allowing light to converge to a single point and thereby improving optical performance.

LBTEK Uninstalled precision polished aspheric lens can be mounted on fixed lens mounts

Product Model	Diameter	Focal length	Numerical Aperture	Unit Price	Lead Time
AC7908-A	12.7 mm	10.0 mm	0.5	$220.43	Contact
AC7606-A	25.4 mm	20.0 mm	0.5	$251.15	Contact
AC18-F15-A	18.0 mm	15.0 mm	0.53	$229.19	Contact
AC7807-A	50.8 mm	40.0 mm	0.5	$458.25	Contact

Precision Polished Aspheric Lens, N-BK7, AR Coating: 400 nm-700 nm, with Mounting

Material: N-BK7
Working Wavelength: 400 nm-700 nm
Diameter: Ø12.7 mm, Ø25.4 mm, Ø50.8 mm
Mounted in Standard Lens Tubes

LBTEK Precision Polished Aspheric Lens with Mount, N-BK7 Material, AR Coating: 400 nm-700 nm, currently available in three sizes: Ø12.7 mm, Ø25.4 mm, Ø50.8 mm. The spherical refraction of ordinary lenses cannot converge parallel light to a single point, resulting in spherical aberration. In contrast, the curvature of an aspheric lens changes continuously from the center to the edge. By adjusting the conic constant and aspheric coefficients, spherical aberration can be minimized, allowing light to converge to a single point and thereby improving optical performance. LBTEK precision polished aspheric lenses are pre-mounted in standard lens barrels, with the product model, type, diameter, focal length, and numerical aperture engraved on the barrel surface for easy identification of lens parameters.

LBTEK Precision Polished Aspheric Lens with Mounting Housing, Product Model and Other Information Engraved on the Surface

Product Model	Diameter	Focal length	Numerical Aperture	Unit Price	Lead Time
MAC1909-A	12.7 mm	25.0 mm	0.22	$227.75	Contact
MAC1610-A	25.4 mm	50.0 mm	0.22	$273.64	Contact
MAC1811-A	50.8 mm	100.0 mm	0.22	$474.46	Contact

Precision Polished Aspheric Lens, S-LAH64, AR Coating: 400 nm-700 nm, with Mounting

Material: S-LAH64
Working Wavelength: 400 nm-700 nm
Diameter: Ø12.7 mm, Ø25.4 mm, Ø50.8 mm
Mounted in Standard Lens Barrels

LBTEK Precision Polished Aspheric Lens with Mount, S-LAH64 Material, AR Coating: 400 nm-700 nm, currently available in three sizes: Ø12.7 mm, Ø25.4 mm, Ø50.8 mm. The spherical refraction of ordinary lenses cannot converge parallel light to a single point, resulting in spherical aberration. In contrast, the curvature of an aspheric lens changes continuously from the center to the edge. By adjusting the conic constant and aspheric coefficients, spherical aberration can be minimized, allowing light to converge to a single point and thereby improving optical performance. LBTEK precision polished aspheric lenses are pre-mounted in standard lens barrels, with the product model, type, diameter, focal length, and numerical aperture engraved on the barrel surface for easy identification of lens parameters.

LBTEK Precision Polished Aspheric Lens with Mounting Housing, Product Model and Other Information Engraved on the Surface

Product Model	Diameter	Focal length	Numerical Aperture	Unit Price	Lead Time
MAC7606-A	25.4 mm	20.0 mm	0.5	$273.64	Contact
MAC7908-A	12.7 mm	10.0 mm	0.5	$227.75	Contact
MAC7807-A	50.8 mm	40.0 mm	0.5	$474.46	Contact

Precision Polished Aspheric Lenses, N-BK7/S-LAH64, AR Coating: 400 nm-700 nm