什么是TWYMAN-绿色干涉仪?

TWYMAN-绿色干涉仪是一种激光干涉仪配置,用于测量光学部件,组件,系统和光学级机械表面的表面形状和发射的波前质量。

In a Twyman-Green laser interferometer, a source beam is collimated, then divided by a beam splitter. The “reference beam” is directed to a high-quality reference mirror. The “test beam” is directed to the test surface. The test wavefront can be shaped to match the concave/convex curvature of the test surface or system by using a diverging lens or beam expander.

Twyman-Green Interferometer (Twyman-Green Laser Interferometer) Diagram - 4D Technology

Twyman-Green Interferometers Measure Surface Shape

When the two reflected beams pass back through the beam splitter, they recombine, forming an interference pattern. This pattern is due to changes in phase caused by the differences between the test surface and “perfect” reference surface. The sensor records this interference pattern as a single acquisition frame.

Twyman-Green干涉仪干扰条纹 -  4D技术188bet金宝搏手机网页

Phase shifting interferometry combines several frames of data to measure the heights of all points on the test surface to accurately quantify the surface shape. Several methods are available to acquire multiple frames. The typical method introduces small, systematic phase shifts by moving the reference mirror between frames. This method can be described as a “frame rate” limited technique.

动态干涉测量:尽管振动尺寸

4D Technology’s Twyman-Green interferometers employ a different approach. These instruments use a polarization-basedDynamic Interferometry®技术同时收集四个数据帧。将四分之一波片引入测试和参考光束,赋予不同的偏振态。

Twyman-Green激光干涉仪 -  4D技术188bet金宝搏手机网页

在相机之前引入的元素将数据分成四个阶段,该阶段可以由传感器同时成像。

A dynamic interferometer uses the polarization of light to split the measurement beam into four phases to measure simultaneously - 4D Technology

动态干涉测量技术的优点是它是曝光有限的。通过动态干涉测量,获取时间与几微秒一样短。这种令人难以置信的快速采集冻结了振动和湍流,即使在嘈杂的环境中也产生出色的测量。

4D Technology pioneered the development ofDynamic Interferometry用于单帧,定量相位测量。

TWYMAN-绿色干涉仪的优点

Twyman-Green Tenferomers与其他类型的干涉仪有几个关键优势。

衡量困难的地方

The compact optical design makes for a small measurement head, which is easy to position in tight spaces. The laser source can be coupled to the head via a fiber optic cable, which moves heat-generating elements away from the optics. The combined result: easy positioning in challenging locations.

尽管振动,但衡量,无需隔离

通过动态Phasecam干涉仪,不需要隔振隔离。当测量大型光学器件时或在长路径上测量时,这种优势是特别关键的,其中隔离系统将受到昂贵的。干涉仪甚至不需要耦合到测试光学器件,进一步简化设置。

没有昂贵的参考的措施

使用外素干涉仪,需要昂贵,高质量的参考传动(平板或球形)光学器件。Twyman-Green Tenferometer不需要此外部参考光学仪。

Operate Remotely

所有功能的机动控制意味着Phasecam Twyman-Green可以在测量塔,真空室,环境室和其他具有挑战性地点进行远程操作。

No Calibration Required

With no mechanical phase-shifting as in a temporal interferometers, fewer parts, and no delicate high-voltage PZT actuators, a Twyman-Green PhaseCam is always accurate.

高分辨率

Twyman-Green干涉仪的固有的轴设计意味着高分辨率和准确性内置于Phasecams中。

测量低返回系统或高度反射表面

偏振控制可让您匹配测试和参考光束中的能量以优化边缘对比度。此功能可让您显着提高测量噪声底板和垂直分辨率。可以支持广泛的测试设置反射率,即使在低返回设置中,也可以实现优异的对比度。

A dynamic Twyman-Green Interferometer can measure in challenging environments - 4D Technology

188bet娱乐平台动态Twyman-Green Tenferomers的应用

Twyman-Green interferometers are particularly well suited for measuring:

  • 大,凹光学
  • slow f/# concave components
  • focal optical systems
  • 非球面光学
  • low-return setups
  • in environmental chambers and pressure vessels
  • over long measurement paths
  • in measurement towers or other hard-to-access locations
  • inside polishing equipment for原位过程反馈
  • moving systems, such as flexible membranes, adaptive optics, and actuating/spinning components.
一个动态的Twyman-绿色干涉仪测量凸镜

188bet金宝搏手机网页4D技术的Twyman-Green激光干涉仪系列

4D’s Twyman-Green PhaseCam laser interferometers from 4D Technology have continually led the industry for high performance and innovation.

With available wavelengths from visible through 3.39 microns, industry-leading analysis software and a range of high-quality accessories, 4D Twyman-Green laser interferometers offer incredible value and flexibility.

4D Twyman-Green激光干涉仪

Phasecam 6110高分辨率扭曲 - 绿色激光干涉仪

4MP传感器,光纤耦合测量头和电动控制器使得令人难以置信的小型PHASecam 6110,非常适合长路径测量和远程安装。使用它用于远程安装在测量塔或压力容器中,以及其他具有挑战性的测试设置。

phasecam.6010 Twyman-Green Laser Interferometers

PHASecam 6010具有微小,易于定位,光纤耦合测量头,4MPx摄像机和电动控制,是机器测量,测量塔或压力容器中的远程安装,以及其他具有挑战性的环境。

Phasecam 4030 Twyman-Green激光干涉仪

The PhaseCam 4030 features a 4 MPx camera, simple manual controls and vibration immunity. Flexible and low cost for the lab or shop floor.

phasecam.NIR Laser Interferometers

Lightweight and vibration-insensitive for surface and wavefront measurements at near infrared (1.053, 1.064, 1.3 and 1.55 micron) wavelengths.

PHASecam SWIR激光干涉仪

紧凑,轻质和振动不敏感,用于精确的表面和波前测量为1.55微米波长。

phasecam.MWIR Laser Interferometer

Accurate surface and wavefront measurements at 3.39 micron wavelength.This vibration-immune system operates in dynamic mode for demanding environments such as clean rooms, or in traditional, temporal phase-shifting as well.Ideal for quality verification of IR optics, focal optical systems and afocal components.

Learn about 4D Technology Twyman-Green Interferometers

阅读更多关于Twyman-Green Tenferomers的更多信息

保持联系

(520) 294-5600

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Tucson, AZ 85706

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