High Quality Double Concave Cylindrical Lenses at Competitive Prices Quality Assurance for Your Optical Investments

• Customization: Available
• Warranty: 1 Year
• Usage: Optical
• Model NO.: FSCL
• Type: Concave Lens
• Transmittance: 90%-95%
• Shape: Cylindrical Shaped Lens
• Material: Optical Glass
• Lenses Color: Clear
• Certification: RoHS, ISO9001, CE
• Customized: Customized
• Diameter (mm): 50.8
• Effective Focal Length (Efl) (mm): 250
• Surface Finish: 20/10-40/20
• Diameter Tolerance: +0.0 / -0.1
• Transport Package: Foam Carton Inner, Then Cartons to Pack Them
• Trademark: FS
• Origin: Tianjin
• Package Size: 20.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

The double concave cylindrical lens holds a unique and significant place in the field of optics, widely used for its distinctive characteristics. Its uniqueness begins with its special structural shape. As the name suggests, this lens features two concave surfaces that take on a cylindrical form. Unlike conventional spherical lenses, cylindrical lenses have curvature along one axis while exhibiting no curvature—or a different degree of curvature—along the perpendicular axis. This particular geometry enables the double concave cylindrical lens to produce unique refraction and focusing effects on light.

Fushi Optics can provide customers with a variety of replicated grating products such as diffraction gratings, transmission gratings and holographic gratings to meet different needs.
 

Specification

PRODUCT NAME	Double Concave Cylindrical Lens
SURFACE PERFECTION	20/10-40/20
DIAMETER	50.8MM
DIAMETER TOLERANCE	+0.0/-0.1
MATERIAL	K9 GLASS
TRANSMITTANCE	91%
TYPE	Cylindrical Lens

Optical Applications‌

From an optical standpoint, the working principle of the double concave cylindrical lens is primarily based on the law of refraction. When light passes through such a lens, it diverges due to the concave surface structure. Along the curved axis, light spreads outward following specific optical rules, while along the direction with little or no curvature, the light continues to propagate with minimal change. This selective divergence allows the lens to play a crucial role in controlling light distribution within various optical systems. For instance, in lighting setups requiring uniform illumination, the double concave cylindrical lens can effectively spread concentrated beams over a broader area, achieving wider and more even lighting coverage.

Manufacturing these lenses is a complex and precise process. Suitable optical materials—such as optical glass or quartz—must be carefully selected. These materials need excellent optical properties, including high transparency and low dispersion, to ensure accurate light refraction and control. Through precision grinding and polishing techniques, the raw material is shaped into the desired cylindrical profile. This process demands highly accurate machinery and skilled craftsmanship to meet exacting specifications for curvature and surface smoothness. After fabrication, rigorous testing and calibration are essential to verify that the lens meets the intended optical performance standards.

In practical applications, double concave cylindrical lenses serve a wide range of purposes. In laser technology, they are often employed to adjust the shape and size of laser beams. Since laser beams typically carry high energy density and have small spot sizes, passing them through a double concave cylindrical lens can cause controlled divergence in a specific direction, thereby reshaping the beam to better suit various tasks such as laser cutting or welding. In optical instruments like microscopes and telescopes, these lenses act as key components for correcting aberrations and enhancing image quality. 

Company Profile

Tianjin Fushi Optics Co., Ltd.

Tianjin Fushi Optics Co., Ltd. is a comprehensive optoelectronic enterprise integrating R&D, production, sales, and after-sales service. Since its establishment in 2012, the company has been dedicated to technological innovation and industrial application in the field of optical components, with its manufacturing base located in China's core optical industry zone. The product portfolio covers a full range of optical basic components, including lenses, prisms, mirrors, optical windows, and filters, with particular technical expertise in the design and manufacturing of diffraction gratings.  
In 2017, Fushi Optics established a professional optical laboratory in Dongli District, Tianjin, committed to integrating optical theoretical research with engineering practice. After years of technical accumulation, the laboratory has gained wide academic recognition for its research achievements in spectral analysis, precision optical processing, and other fields, forming an integrated "industry-academia-research-application" technological innovation system. It continues to provide high-performance optical solutions for the optoelectronic industry.

FAQ

Q: How can I get samples from you?
Just send us your requirements, and we will send samples accordingly. 
 
Q: How long is your delivery time? · 
Regarding inventory, it is 3 working days;
For customized one, it's about 15-25 working days, depending on exact quantity and order date. 
 
Q: Can I customize the products based on my requirements?
Yes, we can customize the material, specifications and optical coating for your optical components as per your requirements.

Q: Are you a factory? 
Yes, we are a professional manufacturer of optical components. We have more than 20 years of experience in optical cold working.
 
Q: How do you control the quality?
More than four times of quality inspection during the production process; we can provide the Quality Test Report.

Packing & Delivery

We attach great importance to every detail in production and communication. Should you have any questions, suggestions, or comments, please do not hesitate to share them with us. Your feedback is invaluable in our pursuit to become a worthy, trusted, and reliable supplier. Thank you for yo