Doublets, Triplets, and Lenses

Standard Achromats:

Standard achromats combine two optical elements (typically of crown and flint glass) cemented together to make an achromat doublet. They’re typically used in telescope objectives, eyepieces, eye loupes, magnifying glasses, and in laser beam manipulation applications.

Precision Aplanats:

Precision aplanats are corrected for speherical aberration, axial color, and coma. The result is an achromat with better optical performance, particularly well-suited for laser focusing objectives and in electrooptical and imaging systems.

Negative Achromats:

These achromats are used to extend focal lengths in conjunction with a positive achromat system or CCD lens.

Laser Achromats:

Ross Optical’s laser achromat offerings are primarily designed for use with an 830nm wavelength diode laser. They’ve been corrected for spherical aberration, coma, and astigmatism.

Steinheil Triplets:

These lenses are often used as eyepieces and make good relay optics for on-and-off axis applications. They’re made of a low index crown element cemented in between two identical meniscus flint elements.

Plano Convex Lenses:

These lens types are ideal for magnifiers, telescopes, collimators, condensers, and imaging instrumentation. They have a positive focal length and are used to converge or focus incoming light.

Bi-Convex Lenses:

Ross Optical’s line of bi-convex lenses are symmetric. At unit conjugation, coma and distortion are cancelled out because of the lenses’ symmetry.

Plano Concave Lenses:

These lens types can be used for beam expansion and in projection systems. Their focal length is negative and they’re used to diverge incoming light.

Bi-Concave Lenses:

These lenses are similar to bi-convex types except that they have two inward curved surfaces.

Fused Silica Lenses:

Fused silica is typically used in deep UV or NIR systems because of its high transmission in those regions. Lenses made with this material exhibit a high laser damage threshold and high operating temperatures.

Aspherical Lenses:

Aspherical lenses are ideal for low f-number and high throughput applications. Condenser quality aspheres are typically used in high efficiency illumination systems.

Ball Lenses:

Ball lenses focus light into fibers in diode laser-to-fiber coupling and fiber-to-fiber coupling. They should be much easier to align due to their physical shape.

Positive Cylinder Lenses:

Positive cylinders are made of BK7 material and have one flat and one convex surface.

Negative Cylinder Lenses:

These lenses have one flat and one convex surface as well, but have a negative focal length.

Rod Lenses:

Rod lenses offer similar optical performance to cylinder lenses. They are used to focus collimated light into a line and are used in many different laser and imaging applications.

For more information on Ross Optical’s offerings, download the brochure or contact them directly to discuss your application.