There are a variety of custom filter solutions available for wide ranging applications. They are detailed here below
Spherical Lenses
Spherical lenses are typically produced on a custom basis, though stock lenses can occasionally be modified to meet specific application requirements. Commonly fabricated lens types include Plano-Convex, Bi-Convex, or Positive Meniscus lenses, which have a positive focal length, as well as Plano-Concave, Bi-Concave, or Negative Meniscus lenses, characterized by a negative focal length. Additionally, various anti-reflection or other coatings can be applied to the surfaces of these lenses.
Multi-Element Lenses
Multi-element lenses are manufactured on a custom basis for a wide variety of end users and applications. This category includes cemented achromatic doublets and lens assemblies mounted in aluminum or plastic housings.
Cylindrical Lenses
Cylindrical lenses possess their "power" or magnification in a single axis or direction and can be custom-made with either positive or negative focal lengths. In machine vision applications, they are frequently used alongside LED line lights or laser diodes to create a clearly defined band or line of light.
Windows & Dust Covers
Protective Windows are glass or plastic elements designed to safeguard lenses, sensors, or lighting systems from debris, dust, and impact forces. While there are standard components available, these windows are often custom-manufactured in various sizes and configurations to meet specific needs. Additionally, coatings such as anti-reflective, hydrophobic, and scratch-resistant can be applied as necessary.
Moreover, MidOpt® Windows and Dust Covers can be obtained with adhesive backing for convenient attachment.
Diffuser Filters
A diffuser is a translucent material that scatters light, typically used as a panel or cover placed directly over a light source to create a more uniform light distribution. Its primary purpose is to reduce the sharpness of shadows and minimize harsh glare, particularly by eliminating intense "hot spots" from lamp filaments or LEDs. Diffusers are often employed over LED lighting to evenly distribute light output while also protecting the LEDs.
MidOpt offers options in both glass and acrylic, available in various thicknesses and transmission levels ranging from 5% to 93%. Common types of diffusers include ground glass, molded or textured acrylic, thin plastic film, flashed or solid opal glass, molded or textured glass, and diffractive diffusers. While diffractive diffusers are generally more expensive, they can effectively manipulate LED light output to achieve a precise spatial configuration and intensity profile with minimal light loss due to back-scattering.
Beamsplitters
Beamsplitters are offered in various thicknesses ranging from 0.5 to 3.0mm, designed for specific wavelength ranges from visible light to infrared, and available in different transmission/reflection ratios. All beamsplitters come with a standard anti-reflection coating.
There are several types of beamsplitters, including cubes, plates, and pellicles, with reflection/transmission options such as 80/20, 50/50, and 30/70.
Construction Advantages:
Cube Beamsplitters: Provide no beam shift, equal reflectance and transmittance, and shorten the optical path of a system.
Plate Beamsplitters: Offer a cost-effective, lightweight solution with a wide variety of available sizes.
Common Applications:
Beamsplitters are used in applications such as in-line illumination for microscopy and inspection of specular objects like semiconductor wafers, image combining for augmented reality, fluorescence microscopy, and interferometry.
Mirrors
MidOpt provides reflectors for visible-near IR, red, green, blue, near-infrared (hot mirrors), and visible (cold mirrors) that can be customized to meet your requirements. Besides flat sheet materials, we can also supply these in various configurations, including right angle (prism), concave, and convex shapes.
Prisms
Prisms are optical elements designed to redirect, fold, displace, and/or transmit light through multiple surfaces. Custom manufactured, they can help integrate an optical system into a more compact space, alter the orientation of an image, or, when paired with suitable coatings, combine or separate an image or light spectrum. The specific angles and surface quantities used depend on the intended effect.
Wedges
A wedge is a specific type of prism used to deviate light in a specific direction by a predetermined angular amount or distance. They can be used singly or in pairs as a fine-tuning adjustment to steer or align a beam of light. Custom sizes, shapes, angles and configurations can be manufactured.
Light Pipes
Glass, plastic and fused quartz light pipes of various lengths and profiles are custom-fabricated to efficiently gather and distribute light to desired areas within an inspection system or to homogenize light and provide more uniform or evenly distributed illumination. Cylindrical, square, rectangular and hexagonal profiles are typically provided in either straight or tapered configurations.
