Substrate options include UV fused silica, calcium fluoride, magnesium fluoride, potassium bromide, sapphire, silicon, sodium chloride, zinc selenide, or zinc sulfide. +86-25-83307137 Sunday Optics manufactures high precison aspheric lens, the accuracy can be 0.5-10um. Chromatic aberration is an important artifact that influences image quality. Fresnel lenses are used in conjunction with Pyroelectric Infrared Sensors (PIRs), also known as Passive Infrared Sensors. Applications included Forward-Looking IR Cameras (FLIR), Payloads, Unmanned Aerial Vehicles (UAV), Thermal Weapon Sight (TWS), Hand-held Thermal Imagers (HHTI) etc. windows, mirrors, polarizers, beamsplitters, prisms), spherical lenses (i.e. 535 infrared lens material products are offered for sale by suppliers on A wide variety of infrared lens material options are available to you, There are 154 suppliers who sells infrared lens material on, mainly located in Asia. Vital produces these Chalcogenides: Ge-As-Se, Ge-Sb-Se, As2Se3 and As2S3. China Infrared Lens manufacturers - Select 2020 high quality Infrared Lens products in best price from certified Chinese Lens manufacturers, Two Lens suppliers, wholesalers and … We have set your country/region to United States. Infrared lens filters are not compatible with fixed lens cameras or smartphone cameras. For example, germanium has a very high index gradient, possibly degrading optical performance if used in a thermally volatile setting. 2. Tax Certificates, Introduction to Infrared | Importance of the Correct Material | Choose the Correct Material | Infrared Comparison. Wavelength Opto-Electronic offers a wide variety of Plano-Convex and Plano-Concave Infrared focusing lens. All Rights Reserved. While it is mainly transmission that classifies a material as either an IR or visible material, another important attribute is index of refraction (nd). imaging lenses, beam expanders, eyepieces, objectives). The intent of filters in black-and-white infrared photography is to block blue wavelengths and allow infrared to pass through. These focusing lenses are used in industrial, life science and defence applications. When choosing the correct IR material, there are three simple points to consider. We offer optical-quality acrylic, polycarbonate, cyclic olefin copolymers (COC), and other specialized materials for the visible light spectrum.These materials transmit somewhat in the near infrared and ultraviolet as well. See the difference a lens designed and coated for SWIR makes in electronic board inspection, surveillance, or process quality control. Vital is one of a select few companies in the world producing laser grade Zinc Selenide using the chemical vapor deposition (CVD) process. Due to limitations on detector range, IR radiation is often divided into three smaller regions: 0.750 - 3μm, 3 - 30μm, and 30 - 1000μm – defined as near-infrared (NIR), mid-wave infrared (MWIR), and far-infrared (FIR), respectively (Figure 1). To understand this concept, consider transmission, index of refraction, dispersion and gradient index. Copyright © Vital Materials Co., Limited. A material's index gradient and coefficient of thermal expansion (CTE) should be evaluated to ensure the user is met with the desired performance. It is also indicative of how much light is refracted when obliquely encountering a surface, where more light is refracted as nd increases (Figure 3). The majority of black-and-white infrared art, landscape, and wedding photography is done using orange (15 or 21), red (23, 25, or 29) or visually opaque (72) filters over the lens to block the blue visible light from the exposure. Along with an engineered coating, Germanium provides the most efficient material to transmit energy to the detector to produce high quality infrared … Take a look at our … You need to use some care to find the IR lens filters that match the lenses you own, but once you do, you’re ready to start shooting some really cool photographs. Thermal Properties – Frequently, optical materials are placed in environments where they are subjected to varying temperatures. The passive PIR lens material is made of milky white flexible, 0.4mm thick High Density PE with UV protection. Transmission – Different applications operate within different regions of the IR spectrum. We professionally make complicated optical system, from design, manufacture to assambly. Different lens materials will react differently to moisture, humidity, chemicals and mechanical stresses. Some materials can be used for either IR or visible applications, most notably fused silica, BK7 and sapphire; however, the performance of an optical system can be optimized by using materials better suited to the task at hand. Catalog Infrared Lenses. The foremost attribute defining any material is transmission. Infrared Material: Ge / ZnSe / HP ZnS / CVD ZnS / Chalcogenide / GaAs / MgF2 / CaF2 Design lens for customer's requirements; Vital provides both multispectral (visible, 3-5µm and 8-12µm IR ranges). Order) 3 YRS . Though the selection process is easier because there is a much smaller practical selection of materials for use in the infrared compared to the visible, these materials also tend to be more expensive due to fabrication and material costs. Calcium fluoride, fused silica, germanium, magnesium fluoride, N-BK7, potassium bromide, sapphire, silicon, sodium chloride, zinc selenide and zinc sulfide each have their own unique attributes that distinguish them from each other, in addition to making them suitable for specific applications. Infrared products are used extensively in a variety of applications ranging from the detection of IR signals in thermal imaging to element identification in IR spectroscopy. The Abbe number for visible materials ranges from 20 - 80, while the Abbe number for IR materials ranges from 20 - 1000. Infrared PIR Fresnel Lenses (Pyroelectric Infrared)Willow offer a wide array of Infrared Fresnel (IR) lenses moulded in consistently thin flexible opaque plastic with the advantage of least absorption loss. These IR materials, or substrates, vary in their physical characteristics. Table 2 gives a list of Infrared glass suppliers. Several of the glasses will be discussed in this section. Transmission is a measure of throughput and is given as a percentage of the incident light. Infrared Window Classification: Let’s explore the specific types of infrared windows: Viewing Panes It also determines the separation of wavelengths known as chromatic aberration. Physical properties such as low dn/dT and low dispersion enable optical designers to engineer color-correcting optical systems without thermal defocusing. The Plane PIR Fresnel lens is primarily used to transmit infrared light. Certain IR substrates perform better depending on the wavelength at hand (Figure 4). As the need for IR applications grows and technology advances, manufacturers have begun to utilize IR materials in the design of plano-optics (i.e. Germanium is the material of choice for quality infrared lenses because the element is transparent in the infrared spectrum and has a high index of refraction. Quantitatively, dispersion is inversely given by the Abbe number (vd), which is a function of the refractive index of a material at the f (486.1nm), d (587.6nm), and c (656.3nm) wavelengths (Equation 1). However, the typical combination and selection method of glass materials for the visible band can hardly satisfy the apochromatic requirements of short-wave infrared (SWIR) lenses. In many cases, index of refraction and density share a positive correlation, meaning IR materials can be heavier than visible materials; however, a higher index of refraction also implies diffraction-limited performance can be achieved with fewer lens elements – reducing overall system weight and cost. Address Book, Additionally, a common concern with IR applications is their tendency to produce a large amount of heat. Dispersion is a measure of how much the index of refraction of a material changes with respect to wavelength. Infrared Lens is made by using specific materials like CaF 2, Ge, Si, ZnSe, ZnS, Chalcogenides, etc.