LSA01-B

• 22-piece optical lens set for versatile laboratory use.
• Ø1/2" (12.7 mm) optics for compact optical systems.
• Made from N-BK7 optical glass.
• Includes four common spherical singlet lens geometries:
  1. Plano-Convex
  2. Bi-Convex
  3. Plano-Concave
  4. Bi-Concave
• Multiple focal lengths from -50 mm to +100 mm.
• Broadband AR coating: 650–1050 nm.
• Each lens is supplied in an engraved threaded mount.
• Mounted optics are compatible with SM05-series components.
• 40-20 scratch-dig surface quality for reduced scattering in laser applications.
• ±1% focal length tolerance.
• ≤3 arcmin centration.
• More than 90% of the optic diameter is available as a clear aperture.
• Lenses are supplied in a labeled storage case/organizer for easy identification and handling.

The Thorlabs LSA01-B is a 22-piece set of Ø1/2" (12.7 mm) N-BK7 spherical singlet lenses designed to provide a broad selection of positive and negative focal lengths for optical experimentation, prototyping, alignment, and system development.

The kit contains Plano-Convex, Bi-Convex, Plano-Concave, and Bi-Concave lenses, covering focal lengths of 15, 20, 25, 30, 40, 50, and 100 mm for the positive lenses, and -15, -25, -30, and -50 mm for the negative lenses. This combination allows users to perform a wide variety of beam-shaping and imaging functions using a single lens set.

The lenses are manufactured from N-BK7, a commonly used optical glass with good transmission throughout much of the visible and near-infrared spectrum. The 650–1050 nm broadband antireflection coating makes this version particularly suitable for optical systems operating in the red, near-infrared, and short-wave NIR regions.

Each lens is mounted in an engraved, threaded cell, allowing the individual optics to be handled more easily and integrated into compatible Thorlabs optomechanical systems. The mounts use threading compatible with the SM05 system, making it possible to install the lenses into appropriate lens tubes and other SM05-threaded components.

The four lens geometries provide different optical functions. Plano-Convex and Bi-Convex lenses are commonly used for converging and focusing beams, while Plano-Concave and Bi-Concave lenses are used for beam divergence and negative optical power. Having multiple focal lengths available makes the kit useful for rapidly testing different optical configurations.

The lenses have a 40-20 scratch-dig surface quality, which Thorlabs specifies to minimize scattering when the optics are used in laser applications. The focal length tolerance is ±1%, with a maximum centration error of 3 arcmin.

Product Type: Mounted Spherical Singlet Lens Kit
Part Number: LSA01-B
Number of Lenses: 22
Optic Diameter: Ø12.7 mm (Ø1/2")
Substrate: N-BK7
Lens Types: Plano-Convex, Bi-Convex, Plano-Concave, Bi-Concave
AR Coating: 650–1050 nm
Lens Diameter Tolerance: +0.00 / -0.10 mm
Focal Length Tolerance: ±1%
Surface Quality: 40-20 Scratch-Dig
Centration: ≤3 arcmin
Clear Aperture: >90% of diameter
Positive Focal Lengths: 15, 20, 25, 30, 40, 50, 100 mm
Negative Focal Lengths: -15, -25, -30, -50 mm
Mounting Thread: SM05 Compatible
Lens Mount: Engraved Threaded Cell
Storage: Labeled Lens Organizer/Case

The LSA01-B is suitable for a wide range of optics and photonics applications, including:

• Laser Beam Focusing
• Beam Expansion and Reduction
• Beam Collimation
• Beam Divergence
• Optical Imaging
• Image Formation
• Beam Shaping
• Laser Beam Alignment
• Optical System Prototyping
• Spectroscopy
• Interferometry
• Microscopy
• Photonics Research
• Quantum Optics
• Fiber Optics
• Laser Experiments
• Educational Optical Experiments
• Laboratory Optical Setups

The LSA01-B is particularly useful for research laboratories, university teaching labs, and optical prototyping, where different focal lengths and lens geometries may be required during system development. Its 650–1050 nm AR coating makes it especially appropriate for applications involving visible red, 780 nm, 850 nm, 980 nm, and other NIR laser sources.