Plano-Concave Lenses
Te Lintelo Systems is your partner for Plano-Concave lenses made to your special needs, includes various coatings, mirrors, lenses, windows, prisms, polarizing optics, UV and IR optics, optical filters.
Plano-Concave Lenses
Concave lenses convert incoming parallel rays in diverging ray bundles that seem to originate from a single point in the object space – the so called imaginary focal point. Like plano-convex lenses these lenses minimize aberrations for absolute conjugate ratios more than 5 or less than 1/5. For this, plano-convex lenses should be placed with parallel beam entering the curved side of the lens. However such an orientation of a lens may be disadvantageous and even dangerous when a plano-concave lens is used to diverge a high power pulsed laser beam. A rest-reflexion from the curved surface will produce a real secondary focus that can damage optical elements preceding the concave lens or even causing a laser break-down at this point. By high power applications the concave surfaces should be oriented in such a way that a secondary focus is avoided.
example specifications:
| Material: | BK7 – Fused Silica – Quartz – Mf2G |
| Focal Length: | +/- 2 % |
| Design Wavelength: | 546,1 nm |
| Diameter Tolerance: | +0/- 0.2 mm |
| Centering: | < 5 min. of arc |
| Wavefront Distortion: | λ/10 |
| Clear Aperture: | 90 % of diameter |
| Surface Quality: | S/D 10-5 |
| Antireflection Coating: | Yes / No / on request |
The range of products we provide you includes:
• Plano optics, like; windows, light pipes, filters [colour glass, interference]
• mirrors [flat, spherical, aspherical, ellipsoidal, parabolic, free form]
• Prisms [Triple, Corner Cubes, Penta, Reflection, Porro, Dove]
• Beam splitters [polarizing, non-polarizing]
• Spherical optics; singlets, doublets, triplets, achromats, cylindric
• Aspherical lenses, ball lenses, rods
• Toroids
• Special types [gradient index, arrays, laser optics]
• Polarizing Optics [Glan-Taylor, Glan-Thomson, Rochon, Wollaston, Brewster, Retardation Plates]
• Domes
• Moulded Glass Optics
• Custom Fiber Optics
We are working with a hugh range of materials, including:
• optical glass from following manufactures / brands [Schott, Ohara, CDGM, Desag, Pilkington]
• Fused Silica
• Crystalline Optics like Quartz, Sapphire and others
• Metal Optics [Aluminum, Brass, Copper, Steel]