Spherical Plano-Concave Lens

Product Description

The Spherical Plano-Concave Lens is precision-manufactured from high-quality S-FPL51 optical glass, a low-dispersion material renowned for its exceptional transmission in the visible and near-infrared spectrum. This lens features a spherical plano-concave design, with one flat surface and one concave spherical surface, making it ideal for beam expansion, light dispersion, and focal length adjustment in optical systems.

With a diameter of 76 mm and a center thickness of 3.8 mm, this lens offers a large aperture for efficient light collection and beam control. It is supplied uncoated as standard, allowing flexibility for custom coating applications based on specific wavelength requirements. The blackened side edges effectively suppress stray light and internal reflections, enhancing image contrast and overall system performance.

What Problems Does This Lens Solve for You?

1. Need controlled beam expansion or divergence?

The plano-concave design provides negative focal power, allowing you to precisely expand or diverge incident light beams to achieve the desired spot size or coverage area — essential for laser systems, projection optics, and illumination applications.

2. Struggling with aberrations affecting image quality?

When paired with convex lenses, this element helps balance spherical aberrations and correct astigmatism. The result: sharper imaging, more accurate beam shaping, and improved system resolution.

3. Is stray light or ghosting degrading your signal?

Blackened side edges significantly suppress internal reflections and stray light, enhancing contrast and signal-to-noise ratio — particularly critical in high-sensitivity detection, fluorescence microscopy, and spectroscopy systems.

4. Need better transmission across UV-VIS-NIR?

S-FPL51 is a premium low-dispersion optical glass with outstanding transmission from visible to near-infrared. It solves the problem of low transmittance and poor color correction common in standard optical materials.

5. Need flexible coating options without compromise?

Supplied uncoated, this lens gives you full flexibility to apply AR, reflective, or protective coatings tailored precisely to your wavelength requirements — no need to settle for off-the-shelf coating specs.

6. Is your current aperture limiting light throughput?

With a 76 mm diameter, this lens offers a generous clear aperture, solving light collection issues in low-light or high-power laser applications.

7. Facing integration constraints in compact systems?

The plano-concave geometry and 3.8 mm center thickness allow for straightforward integration into space-limited optical assemblies without sacrificing optical performance.

8. Worried about quality and consistency?

Every lens undergoes rigorous quality control — surface accuracy, dimensional tolerance, and edge finish are individually inspected to ensure reliable, repeatable performance from batch to batch.