Optical Basics: What is FOV (Field of View)
For optical imaging instruments and components, understanding the basic concept of FOV (Field of View) is fundamental for selecting the appropriate optical lenses and components that meet your specific requirements. Here Shalom EO will state the definitions, the equations, and the real-life interpretations of these concepts.
Optical Substrate Material Selection Guide
The selection of optical substrate material is a vital step to determine the best appropriate optics for your individual applications. The characteristics(optical transmission, refractive index, hardness, etc.) of representative optical materials such as N-BK7, UV Fused Silica, Zerodur Glass, Chalcogenide Glass, BaF2, CaF2, MgF2, Germanium, Zinc Selenide, ZnS, Sapphire, Silicon, alpha-bbo, calcite, YVO4, and F2 glass are introduced and compared in this article from Shalom.
Optical Basics: Spherical Aberrations and Coma
This is a short piece of explanations about spherical aberrations and coma/comatic aberrations, which belong to the wider range of optical aberrations. Straightforward and readable detailed information, illustration diagrams of the complex and intriguing concepts of spherical aberrations and coma/comatic aberrations.,
LWIR Imaging VS MWIR Imaging, Which is Better?
This article is a thorough comparison of the differences and features of LWIR and MWIR thermal imaging cameras, comparing the emittance and thermal contrast in the two spectral regions, the impact of climate/thermal effects, LWIR and MWIR thermal imaging camera lenses, costs, and applications.
Selection Tutorial for Lens Assemblies
This is a basic tutorial and guide to help you understand some important glossaries when you are selecting Optical Lenses and Camera Lenses.
Passive Thermal Imaging and C-UAS Techniques
Both state and non-state parties face the imposing threats from the weaponization and illegal intrusion of UAS. The development of Counter-UAS, or C-UAS, in particular, Counter-Small UAS to detect, track, and intercept drones has become an urgent mission. The article discusses the challenges in the current C-UAS market and evaluates various approaches incorporated into the C-UAS, including LWIR, MWIR Passive Thermal Imaging and other approaches like radar, visual cameras, SWIR imaging.
Advantages and Applications of Sapphire Windows
Sapphire Windows excel in windows made from other glass counterparts, especially in the aspects of superior surface hardness, durable qualities, and versatile functionalities. This article discusses the advantages and applications of sapphire windows.
Chromatic Aberration, Field Curvature, Distortion, Astigmatism
This article is an introduction to different kinds of optical aberrations including Chromatic Aberration, Field Curvature, Distortion, and Astigmatism, the basic definition and the principle of, and how to correct these aberrations are explained in the text.
Lens Selection Guide
This article enumerated the different lens classifications including plano-convex lens, plano-concave lens, double-convex lens, double-concave lens, meniscus lens, ball/half-ball lens, achromatic doublet lens, cylindrical plano-convex lens/plano-concave lens, rod lens, and aspheric lens, exploring their characteristics, and the appropriate context to use them.
BBO Crystals and Its Applications
This article describes the applications of BBO Crystals (beta barium borate crystals), including Optical Nonlinear Frequency Conversion (Harmonic Generation and OPA, OPO), Electro-optical Modulations (EOM), and Spontaneous Parametric Down Conversion (SPDC).