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本帖最后由 cheji 于 2012-3-24 19:09 编辑
Aspherical Lenses
非球面透镜
Aspherical lenses are lenses with complex curved surfaces,
such as where the radius of curvature changes according to
distance from the light beam axis.
所谓非球面镜是具有复杂曲面的透镜，诸如其上每点的曲率随着到光轴的
距离不同而变平缓。
Spherical lenses are subject to aberration and therefore
cannot concentrate all the light into one point.
Aspherical lenses, however, offer excellent aberration
correction performance, providing superior resolution
performance, even with compact optics composed of a small
number of elements.
由于球面镜片存在球差，不能将光束成像集中于一点。如果使用具有很高像差矫正
能力的非球面 镜片，那么，即使是镜片数量少而结构紧凑的光学系统也可以实现
优异的成像性能。
Based on our long experience in aspherical fabrication,
we provide optimal solutions for various customer needs.
基于在非球面加工方面的长期经验，尼康对各种不同的用户需求都能
提供理想的解决方案。
High-precision grinding
高精度研磨（名词小释）
After the grindstone is moved to grind the glass down to
an aspherical curvature, the surface is polished.
This technique provides exceptional precision, and is
used to manufacture aspherical lenses for steppers.
沿着非球面形状移动高速旋转的磨石，用以研磨旋转的光学玻璃表面，然后进行抛光。
这项技术可以提供极高精度，用于制造光刻机的非球面镜。
High-precision ground and polished aspherical lenses
高精度研磨抛光非球面镜（详细说明）
The surfaces of spherical lenses made of optical glass are
ground into aspherical shapes by grindstones revolving at
high speeds.
Utilizing expert craftsmanship, we established an automatic
system for high-speed aspherical grinding with nanometer-order
precision.
研磨机以高速旋转的磨石，将具有球面镜片的光学玻璃表面研磨为非球面。
在尼康，富于长期丰富经验的技能者建立起来的高精度研磨加工技术，利用
专门研磨装置，实现非球面形状精度可达纳米（十亿分之一米）级，同时
建立加工高速化。
In this process, the master can be formed into special
aspherical surfaces, such as off-center parabolic curvatures,
then the shape can be transferred to optical resin with the
molding technique.
Nikon is especially good at this replica-forming technique,
and applies it in manufacturing components for optical fiber
communications and more.
在这一过程中，技师可以做出特殊的非球面，比如离心抛物线曲面，
这些曲面形状还可以通过模铸技术转移到光学树脂上。
该技术也称“复制成型技术“，并将它应用在光纤通讯组件的制造
和其他方面上。
Our precision grinding technology is unsurpassed in a range
of applications demanding ultra-precision, such as for making
aspherical lenses for projection lenses of steppers and
aspherical metal molds.
我们的精密研磨技术足以胜任一系列具有很高精度要求的应用，比如
制造光刻机的非球面投影镜片、非球面金属模具。
PGM
精密玻璃模压（名词小释）
The glass lens material is pressed at high temperature and
pressure in the aspherical-shaped mold.
在非球面形状的模具中，玻璃镜片材料在高温和压力下被压制成型。
Precision Glass Mold (PGM) aspherical lenses
精密玻璃模压非球面镜（详细说明）
In precision glass molding, optical glass is softened by
heating, then shaped in an aspherical mold made of special
heat-resistant material.
在精密玻璃模压工艺下，经高温加热而软化的光学玻璃，在特殊耐热材料制成
的非球面模具中模压成型。
We have developed a special molding technique effective
for medium- to large-diameter aspherical lenses, which
were previously considered to be difficult to mold.
This technology is widely utilized in the manufacture
of aspherical lenses for lenses for film-based and
digital cameras.
即使对于从前认为难以模压的中，大尺寸非球面镜片，我们也开发了
特殊的模压技术进行有效处理。
这项技术被广泛应用于制造胶片相机和数码相机所用镜头中的非球面
镜片。
PAG
塑料覆层非球面镜片（名词小释）
UV-curable resin is injected between the spherical glass
lens and the aspherical metal mold, then irradiated with
UV light to form hybrid lenses.
在球面玻璃与非球面金属模具之间注入紫外线硬化树脂，运用紫外光
照射形成复合镜片。
PAG (Plastics on Aspherical Glass) hybrid lenses
塑料覆层非球面玻璃复合镜（详细说明）
The term Plastics on Aspherical Glass, or PAG, generally
refers to the method used to fabricate hybrid aspherical
lenses combining glass and plastic.
UV-curable resin is injected between the spherical glass
and the aspherical metal mold, and irradiated with UV to
form a glass-resin hybrid aspherical lens.
所谓塑料覆层非球面玻璃（PAG），一般指的是将玻璃和塑料结合在
一起以加工复合非球面镜的方法。
在球面玻璃与非球面金属模具之间注入紫外线硬化树脂，运用紫外光
照射形成玻璃－树脂复合非球面镜片。
Nikon has developed its own plastics and molding technology
for PAG, and now manufactures large-diameter, high-precision
lenses with large aspherical lens surfaces in volume and at
low cost.
尼康开发了一整套用于PAG的塑料和模具技术，现用于制造大尺寸、
高精度的大型非球面镜，并大量生产而廉价化。
Nikon has developed original technology for each key factor
-- including materials, fabrication and measurement --
to make possible these three methods of manufacturing
aspherical surfaces.
By selecting the best method for each individual application,
we can quickly meet the demand for a wide range of products,
from ultra-precision custom designs to reasonably-priced
volume items.
尼康开发了独自技术控制每项关键因素，包括材料、加工和测量，从而
确保利用以上三种方法进行非球面制造。
通过对每项独立应用都选择最佳方法，我们可以快速满足广泛的产品
需求，对大宗订单提供高精度的订制设计以及合理的价格。 |
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