Norland Optical Adhesive 61 ("NOA 61") is a clear, colorless,liquid photopolymer that will cure when exposed to ultravioletlight. Since it is a one part system and solids, it offersmany advantages in bonding where the adhesive can be exposed to UVlight. The use of NOA 61 eliminates premixing, drying or heatcuring operations common to other adhesive systems. Curing time isremarkably fast, and is dependent upon the thickness applied andthe amount of ultraviolet light energy available.
NOA 61 meets FederalSpecification MIL-A-3920 for optical adhesives and is approved foruse on all government contracts specifying such adhesives. Theadhesive is designed to give the best possible optical bond toglass surfaces, metals, fiberglass and glass filled plastics. NOA61is recommended for bonding lenses, prisms and mirrors for military,aerospace and commercial optics as well as for terminating andsplicing optical fibers.
NOA 61 also has excellentclarity, low shrinkage and as light flexibility that make itsuperior to other materials for optical bonding. Thesecharacteristics are important in order for the user to produce high optics and achieve long term performance under changingenvironments.
NOA 61 is cured byultraviolet light with maximum absorption within the range of320-380 nanometers with peak sensitivity around 365nm. Therecommended energy required for full cure is 3 Joules/sq. cm inthese wavelengths. The cure is not inhibited by oxygen, hence anyareas in contact with air will cure to a non-tacky state whenexposed to ultraviolet light.
诺兰德光学粘合剂61(“NOA61”)是一种透明，无色，液体光聚合物，暴露在紫外线下会固化。由于它是一个部分系统和固体，它提供了许多优点，粘接粘合剂可以暴露在紫外线下。noa61的使用消除了其他粘合剂系统常见的预混、干燥或热固化操作。固化时间非常快，并且取决于所应用的厚度和可用的紫外光能量的量。
NOA61符合联邦MIL-A-3920光学胶粘剂规范，并被批准用于所有指定此类胶粘剂的政府合同。该粘合剂旨在为玻璃表面、金属、玻璃纤维和玻璃填充塑料提供zuijia的光学粘合。NOA61推荐用于粘合透镜、棱镜和反射镜，用于军事、航空航天和商业光学，以及光纤的终端和拼接。
noa61还具有优异的清晰度，低收缩率和轻柔韧性，使其优于其他材料的光学键合。这些特性对于用户在不断变化的环境下生产高质量的光学器件和实现长期性能非常重要。
noa61采用紫外光固化，Zui大吸收范围为320-380纳米，峰值灵敏度约为365nm。完全固化所需的推荐能量是3焦耳/平方。波长是厘米。固化不受氧气的抑制，因此任何与空气接触的区域暴露在紫外线下都会固化到不粘的状态。
