LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

Optical Material: CaF2
Operating Wavelength: 200 nm-8.0 μm
Application: Imaging, Beam Expansion

A double-concave lens has concave surfaces on both sides with identical radii of curvature. It has a negative focal length and is commonly used for beam collimation, increasing (or decreasing) focal length, or expanding (or reducing) image size. CaF₂ is the most common material for infrared lenses, and LBTEK chooses to use CaF₂ to manufacture various lenses, primarily for infrared applications. In addition to CaF₂ double-concave lenses, LBTEK also offers double-concave lenses made of N-BK7 and N-SF11. LBTEK provides uncoated double-concave lenses with a theoretical operating wavelength range of 200 nm to 8.0 μm. All our lenses undergo fine processing and strict quality control to ensure that LBTEK delivers high-quality lens products to users at reasonable prices.

Attribute

Optical component materialCaF2

Operating Wavelength200 nm - 8.0 μm (uncoated)

Focal length tolerance±1%

Design wavelength588 nm

Surface finish (scratches/pits)40/20

Flatness (@633 nm)λ/2

Curved Aperture3

Local surface irregularity1

Eccentricity≤3 arcmin

Double-Concave Lens, CaF2, Uncoated: 200 nm-8.0 μm

Substrate Material: CaF2
Operating Wavelength: 200 nm-8 μm (uncoated)
Application: Imaging, beam expansion or reduction

LBTEK double-concave lenses have a negative focal length and are commonly used in applications such as imaging or beam collimation. LBTEK chooses to use CaF2 to manufacture various lenses. CaF2 exhibits high transmittance in both ultraviolet and infrared spectral ranges, along with an extremely high damage threshold, making it widely applicable in the excimer laser industry. All circular lenses from LBTEK come pre-installed with standard lens sleeves or lens mounting adapters. These mechanical components are engraved with product model, type, diameter, and focal length for easy identification of lens parameters by users.

The surface of LBTEK lens housings is engraved with product model and other information

Product Model	Diameter	Focal length	Unit Price	Lead Time
MBCC70617	25.4 mm	-200.0 mm	$184.08	Contact
MBCC70613	25.4 mm	-100.0 mm	$184.08	Contact
MBCC70612	25.4 mm	-75.0 mm	$184.08	Contact
MBCC70610	25.4 mm	-50.0 mm	$184.08	Contact
MBCC70607	25.4 mm	-30.0 mm	$184.08	Contact

Double-concave lens, CaF2, uncoated: 200 nm-8.0 μm, unmounted

Substrate Material: N-SF11
Operating Wavelength: 200 nm-8 μm (uncoated)
Application: Imaging, beam expansion or reduction

LBTEK unmounted lenses are suitable for building compact systems

Product Model	Diameter	Focal length	Unit Price	Lead Time
BCC70617	25.4 mm	-200.0 mm	$175.19	Contact
BCC70613	25.4 mm	-100.0 mm	$175.19	Contact
BCC70612	25.4 mm	-75.0 mm	$175.19	Contact
BCC70610	25.4 mm	-50.0 mm	$175.19	Contact
BCC70607	25.4 mm	-30.0 mm	$175.19	Contact

Double-Concave Lens, CaF2, Uncoated: 200 nm–8.0 μm