THORLABS AL2520M-B Aspheric Lens Bbar 20.0MM 650-1050NM

( Brand: Thorlabs ), ( Type: Aspheric Lens ), ( Manufacturer Part Number: AL2520M-B ), ( Intended Use/discipline: Biological Laboratory )

Review THORLABS Aspheric Lens 20.0mm Bbar Coating 650-1050nm

The Thorlabs AL2520M-B is a high-performance, aspheric lens designed for use in applications requiring excellent image quality over a broad wavelength range. This lens features a 20.0mm focal length, making it well-suited for use in telephoto systems or as an objective lens in imaging applications. The lens's back focal length is 65.0mm, allowing for ample working distance.

The AL2520M-B is manufactured with a high-quality, BK7 glass substrate, which provides excellent transmittance in the 650 to 1050nm wavelength range. This makes the lens an ideal choice for applications in the near-infrared spectrum, such as spectroscopy, laser systems, and other optical imaging systems.

The aspheric design of the AL2520M-B ensures that it provides excellent correction for spherical aberrations, distortions, and other optical aberrations. This results in highly accurate and precise imaging, even in complex optical systems. The lens's surface quality is also exceptionally high, with a measured scatter of less than 0.03 waves RMS (1/e ) at 633nm wavelength.

The AL2520M-B is designed for easy integration into a variety of optical systems. Its lens mount is threaded with a standard M27x1.05 male thread, making it compatible with a wide range of optical mounting systems. The lens is also supplied with an adjustable lens foot, which allows for fine adjustment of the lens position and orientation.

Overall, the Thorlabs AL2520M-B is a high-performance, aspheric lens that offers excellent image quality over a broad wavelength range. Its design features excellent correction for optical aberrations, high surface quality, and a threaded mount for easy integration into a variety of optical systems. This makes it an ideal choice for applications in spectroscopy, laser systems, and other optical imaging systems in the near-infrared spectrum.

The Thorlabs AL2520M-B is an aspheric lens with a focal length of 20.0mm and a back focal length of 65.5mm. It is designed for use in the spectral range of 650-1050nm. Here are some pros and cons of buying this lens:

1. High Quality: Thorlabs is known for producing high-quality optical components. This lens is no exception, with its precise surface quality and excellent optical performance.

2. Wide Spectral Range: The spectral range of this lens covers a large portion of the visible and near-infrared spectrum, making it a versatile option for various applications.

3. Compact Size: With a relatively small size and lightweight design, this lens is easy to integrate into various optical systems.

4. Good Transmission: The lens has good transmission in the specified spectral range, which is important for maximizing the signal and achieving good sensitivity in optical measurements.

1. Limited Focal Length: This lens has a fixed focal length of 20.0mm, which may not be suitable for all applications.

2. Higher Cost: Compared to other lenses with similar specifications, the Thorlabs AL2520M-B may be more expensive.

3. Potential for Chromatic Aberration: Although this lens is designed for use in the 650-1050nm spectral range, there is still a possibility of chromatic aberration, which can result in color fringing in the image.

The Thorlabs AL2520M-B is a high-quality aspheric lens with a wide spectral range, compact size, and good transmission. However, its limited focal length and higher cost may be disadvantages for some applications. Ultimately, the decision to purchase this lens will depend on the specific requirements of the optical system and the available budget.

If the application requires a lens with a focal length of 20.0mm and a wide spectral range of 650-1050nm, and budget is not a constraint, then the Thorlabs AL2520M-B is an excellent choice due to its high-quality optical performance and compact size. However, if a variable focal length lens or a lower cost option is preferred, other alternatives should be considered.

Details:

Thorlabs AL2520M-B Aspheric Lens f 20.0mm BBAR Coating 650-1050nm.

part #: al2520m price

• $27.00

specifications quakedental:

• brand: Thorlabs
• type: Aspheric Lens
• manufacturer part number: AL2520M-B
• intended use/discipline: Biological Laboratory

payments quakedental:

• credit card: Diners-club
• other
• wallet: Paypal

offer quakedental:

• best offers: True
• quantity: 1
• sold: 0
• started: April 8, 2026
• options: Ship-to-home
• availability: In Stock

general quakedental:

• condition: Used
• Business Industrial > Healthcare, Lab Dental > Other Healthcare, Lab Dental

seller quakedental:

• rating: 100.0%
• # reviews: 67
• city: San Mateo, California

returns quakedental:

• policy: No Returns

shipping quakedental:

• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage
• transit: 5-10 Days
• cost: $9.99
• class: Standard

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