Norland Optical Adhesive 61 ("NOA 61") is a clear, colorless, liquid photopolymer that will cure when exposed to ultraviolet light. Since it is a one part system and solids, it offers many advantages in bonding where the adhesive can be exposed to UV light. The use of NOA 61 eliminates premixing, drying or heat curing operations common to other adhesive systems. Curing time is remarkably fast, and is dependent upon the thickness applied and the amount of ultraviolet light energy available.

NOA 61 meets Federal Specification MIL-A-3920 for optical adhesives and is approved for use on all government contracts specifying such adhesives. The adhesive is designed to give the best possible optical bond to glass surfaces, metals, fiberglass and glass filled plastics. NOA61 is recommended for bonding lenses, prisms and mirrors for military, aerospace and commercial optics as well as for terminating and splicing optical fibers.

NOA 61 also has excellent clarity, low shrinkage and as light flexibility that make it superior to other materials for optical bonding. These characteristics are important in order for the user to produce high quality optics and achieve long term performance under changing environments.

NOA 61 is cured by ultraviolet light with maximum absorption within the range of 320-380 nanometers with peak sensitivity around 365nm.  The recommended energy required for full cure is 3 Joules/sq. cm in these wavelengths. The cure is not inhibited by oxygen, hence any areas in contact with air will cure to a non-tacky state when exposed to ultraviolet light.

诺兰德光学粘合剂61(“NOA 61”)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。

NOA 61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。