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Technical Blogs
What is a pentaprism what job does it do in the camera?
Penta prism is a five-sided reflecting prism used to deviate a beam of light by a constant 90°, even if the entry beam is not at 90° to the prism. The beam reflects inside the prism twice, allowing the transmission of an image through a right angle without inverting it (that is, without changing the image’s handedness) as an ordinary right-angle prism or mirror would. The reflections inside the prism are not caused by total internal reflection, since the beams are incident at an angle less than the critical angle (the minimum angle for total internal reflection). Instead, the two faces are coated to provide mirror surfaces. The two opposite transmitting faces are often coated with an antireflection coating to reduce spurious reflections. The fifth face of the prism is…
Common Mistakes in Industrial Lens Selection (And How to Avoid Them)
Introduction Selecting the right industrial lens is a critical step in building reliable machine vision and industrial imaging systems. However, many projects encounter image quality issues, unstable performance, or unexpected delays—not because of sensor or software limitations, but due to mistakes made during lens selection. These mistakes are common, even among experienced buyers, and often stem from focusing on specifications alone while overlooking manufacturing, assembly, and system-level factors. This article highlights the most common mistakes in industrial lens selection and explains how to avoid them to achieve stable, real-world performance. Mistake 1: Focusing Only on Resolution Numbers One of the most common mistakes is choosing a lens based solely on nominal resolution. Why this is a problem: Resolution does not guarantee contrast Edge performance is often ignored Real operating aperture is…
Sapphire
Sapphire (Al₂O₃) is a widely used gem material known for its exceptional physical and optical properties. It is a hard and durable crystal, typically appearing in blue but can also be found in colorless, pink, yellow, green, and other hues. The color of sapphire is mainly due to trace metal ions like iron and titanium. Optical Properties of Sapphire High Transmittance: Sapphire exhibits good transmittance across a broad spectrum, particularly in the visible and near-infrared regions (approximately 200 nm to 5000 nm). This makes sapphire an ideal material for high-quality optical windows, lenses, and other optical components. High Refractive Index: Sapphire has a refractive index of about 1.76, allowing it to effectively refract light and produce clear optical images. This property helps reduce light scattering and blurring in optical components.…
Short-wavelength pass filter
A shortpass filter is an optical filter designed to allow light below a certain wavelength to pass through while blocking longer wavelengths. Also known as a short-pass filter, its function is to filter out longer wavelength light (such as red light or infrared) and only let shorter wavelength light (such as ultraviolet or blue light) pass through. Shortpass filters are widely used in spectral analysis, laser systems, fluorescence microscopy, and various scientific experiments requiring specific wavelength light. Working Principle of Shortpass Filters Shortpass filters are primarily manufactured using interference coating technology. Multiple layers of optical thin films are coated on a substrate, with their thickness and refractive indices precisely designed and controlled. This design causes light above a certain wavelength to interfere and be reflected, while light below that wavelength…
Ion Beam Sputtered Coatings (IBS)
VY Optoelectronics offers custom IBS coatings for laser mirrors, beam splitters, polarizers, and other precision optical components at wavelengths from 266nm to 3um. The IBS coating technique is right for complex spectral designs, high power Nd: YAG & fiber lasers, and applications where it’s critical to attenuate losses from absorption and/or scatter. Click here for absorption data taken at 1064nm (< 1.5ppm!). Typical coating types include dielectric high power high reflectors (HR), broadband high reflectors (BBHR), low-loss anti-reflection (AR), dual-band anti-reflection (DBAR), dichroic beam splitters, output couplers, low phase shift mirrors, dispersion controlled mirrors, edge filters, band-pass filters, thin-film polarizers, and non-polarizing beam splitters. We also provide IBS thin film coatings on customer-supplied substrates like windows, lenses, and turning prisms. We are often asked for AR coatings with damage thresholds of 20J or sometimes even…
Difference Between Industrial and Camera Lenses: What You Need to Know
Since our founding in 2010, we have been dedicated to the precision manufacturing of optical components. In 2018, we expanded our capabilities by establishing an R&D department focused on optical design, lens assembly, and the integration of opto-mechanical-electrical systems. As part of our commitment to sharing knowledge and supporting our clients, this article explores the key differences between industrial lenses and consumer camera lenses. Introduction Lenses are at the heart of all imaging systems, but not all lenses are created equal. While consumer camera lenses are designed for everyday photography, industrial lenses are engineered for high-performance imaging in rigorous environments. Understanding the difference between these two types of lenses is critical for selecting the right optical solution for your application. Key Differences between Photographic Lenses and Industrial Vision Lenses Here,…