Optics for Precision Light Transport

The Optics category generally includes lenses, mirrors, prisms, beam splitters, windows, filters, polarizers, waveplates, and diffraction gratings. These components manipulate electromagnetic radiation, typically from UV through visible to IR, by controlling propagation direction, phase, amplitude, polarization, or spectral content. They are used to form images, collimate or focus beams, route light paths, and condition spectra in laser, imaging, sensing, and metrology systems.

Focal length, numerical aperture (NA), and f-number define how strongly a lens converges or diverges light and how much light it can collect or resolve. Surface quality (e.g., 20-10 scratch-dig), surface figure (e.g., λ/10 P-V), and wavefront error determine imaging performance and scattering, while anti-reflection (AR) coatings minimize Fresnel losses and back-reflections over specified wavelength bands. Additional critical parameters include substrate material dispersion (Abbe number), refractive index, and damage threshold for high-power laser use.

Common lens types include singlets (plano-convex, bi-convex, meniscus), doublets, and aspheres; singlets are economical but more aberration-prone, while doublets and aspheres reduce aberrations for demanding imaging or tight focusing. Mirror variants include protected and enhanced metal mirrors (broadband, moderate reflectivity) and dielectric mirrors (high reflectivity in narrow bands, high laser damage threshold). Filters range from simple absorptive glass filters to thin-film interference types (long-pass, short-pass, bandpass, notch, dichroic), which provide sharper spectral edges and higher optical densities but narrower, angle-sensitive band characteristics.

For imaging, key parameters include wavelength range, focal length, f-number or NA, field of view, distortion, modulation transfer function (MTF), and tolerances on surface figure and centering to control aberrations and image quality. For laser applications, you typically prioritize wavelength and bandwidth matching, surface quality, AR or HR coating reflectance, transmitted wavefront error, and laser-induced damage threshold (LIDT), along with substrate material compatibility for the intended power, pulse duration, and environment. Mechanical factors such as clear aperture, edge thickness, and mounting interface are important in both cases to ensure proper integration and alignment stability.

For UV and deep-UV, fused silica or CaF₂ are commonly chosen due to low absorption and good transmission, whereas BK7 and similar crown glasses are typical for visible and near-IR, and materials like ZnSe, ZnS, Ge, and Si are used for mid-IR and thermal IR. Coatings should be specified by wavelength range, reflectance or transmission profile, polarization dependence, and angle of incidence; broadband AR coatings are useful for multi-line or tunable sources, while narrowband AR or dielectric HR stacks are preferable for discrete laser lines. You should also consider coating durability, environmental stability (e.g., MIL or ISO tests), and LIDT where high pulse energies or CW powers are involved.

Standard catalog components (e.g., common lenses, mirrors, windows) are often available from stock or with lead times of 1–4 weeks, while custom geometries, materials, or coatings can extend to 6–12 weeks or more depending on complexity and volume. Major cost drivers include substrate material (exotic crystals vs. standard glasses), surface figure and quality tolerances, coating type and performance requirements, part size and shape complexity, and inspection/qualification levels. Many suppliers offer custom diameters, thicknesses, wedge, curvature, drilled holes, and specialized coatings, often with minimum order quantities for highly non-standard parts.

On FindLight, you can filter Optics listings by type (e.g., lenses, mirrors, filters), wavelength range, material, diameter, focal length, and other key parameters using the left-hand or top-level filters, then sort results by relevance or vendor. Product pages provide detailed datasheets, parameter tables, and sometimes drawings, allowing side-by-side comparison by opening multiple items in separate tabs or browser windows. To request a quote without registration, you can use the "Inquire Price" form on each product page, specifying required quantities, target specifications, and any customization needs; the inquiry is then routed directly to the supplier for pricing and lead-time information.