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ZnS (Zinc Sulphide Multispectral, CVD)

ZnS Multispectral (water-clear) is used for IR windows and lenses in the thermal band (8 to 14 μm) where maximum transmission and lowest absorption is required. Also selected for use where visible alignment is an advantage.

ZnSe (Zinc Selenide)

ZnSe is used widely for IR components, windows and lenses, and for spectroscopic ATR prisms. Zinc Selenide is one of the materials of choice for CO2 laser optics operating at 10.6 microns.

N-BK7

N-BK7 is a Schott designation for the most common Borosilicate Crown glass used for a wide variety of visible applications. The basic data here is given for N-BK7. Full optical design data on N-BK7 and other glasses can be found by following the web links at the bottom of this page.

Pockels cells

Pockels Cells are important electro-optic device which exploit the pockels effect. Applying a constant or varying voltage (electric field) on Electro-Optic Crystals can cause the crystal birefringence to change linearly.

用于电光应用的 BBO 晶体

β-硼酸钡（BBO）晶体是一种优异的电光晶体，适用于波长范围从200nm到2500nm的高功率应用。它可用作电光Q开关晶体。β-BBO晶体或β-硼酸钡晶体在激光功率承受能力、高损伤阈值、温度稳定性以及几乎不受压电振铃影响方面，相较于其他材料具有显著优势。

什么是球透镜和半球透镜

球面透镜属于一种特殊形式的双凸透镜，其几何形状为球体。球面透镜通常由单一材料制成，通常使用在所需波长区域具有良好透光性的光学玻璃。球面透镜的典型应用包括光纤领域的光聚焦（例如激光与光纤耦合、光纤间耦合）、发光器件和探测器。半球透镜是球面透镜的变体，更适合用于紧凑型设计。

What are SAW Wafers and Crystals

A Surface Acoustic Wave (SAW) device is a device that transfers the input electrical signal into acoustic signal through the converse piezoelectric effects or vice versa.SAW devices provide wide application possibilities across the fields of radio and television, mobile and wireless telephone, satellite communication, GPS system, identification system.

Introduction to Waveplates and Retarders

It is crucial for buyers to discriminate the differences between the various types of Waveplates and Retarders, here is a general, simple and approachable introduction about waveplates and retarders, to help you understand better the differences and traits of each type of them.

JGS1

JGS1 is a synthetic UV-grade quartz glass suitable for optical applications equivalent to Corning 7980. JGS1 has high transmission across the UV to the NIR spectrum (180-2500nm), and is particularly advantageous for application in the UV range. However, like most UV grade Fused Silica, JGS1 contains relatively higher OH compositions than the IR grade Fused Silica, which leads to higher absorption in the IR band.

Super Achromatic Waveplates

Shalom EO recently joined the development of Super Achromatic Waveplates. Unlike conventional achromatic waveplates, super achromatic waveplates consist of six waveplates aligned together, three made from quartz (Crystalline SiO2) and three made from magnesium fluoride (MgF2). With an increased number of composing waveplates, this design minimizes the fluctuations of retardation and substantially broadens the application spectrum from the UV to the NIR.
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