Ocean Optics 准直测量仪采用横向剪切干涉技术，用于检测和调整激光束的准直性。测量仪也可用于测量波阵面曲率和发散/收敛量。其工作波长范围是350-2500 nm。准直测量仪由楔形高质量光学平晶构成，外面带有铝制包边，可选孔径范围10-200毫米。

准直测量仪可提供实时测量结果。为了使用这个系统进行光学波阵面的测量，先让被测光束与测量仪成~45度的夹角，光束将被屏幕已一定的角度反射回来。两个重叠的圆圈图案将被测量仪上参考线的阴影切为两半。在两个图案的重叠区域可以看到干涉的图案。通过调整系统使干涉图平行与参考线的阴影线，可正确地校准光束。

Our Collimation Testers are lateral-shearing interferometers that can be used to examine and adjust the collimation of laser light. The testers can also be used to measure wavefront curvature and quantify divergence/convergence magnitude.

• Remarkably easy-to-use
• Apertures from 10-200 mm
• Provide instantaneous results

Usable in the 350-2500 nm wavelength range, each Ocean Optics Collimation Tester consists of a wedged, high-quality optical flat housed in a heavy-duty anodized aluminum frame. Testers are available with apertures ranging from 10 to 200 millimeters in diameter.

Ocean Optics Collimation Testers produce instantaneous results. To examine an optical wavefront in a collimating system, simply place a tester at ~ 45° incident to an expanded beam so that the face of the collimation tester is illuminated. The beam is reflected onto a screen placed at a right angle to the reflected beam. Two overlapping circular images bisected by the shadow of the collimation tester's reference wire will appear on the screen. Fringes -- parallel patterns of light and dark areas -- will be seen in the overlap region of the two images. To properly collimate the beam, adjust the collimating system until the fringe pattern is parallel to the shadow of the tester's reference wire.

The following table lists Ocean Optics Collimation Testers by product code, aperture size and price.

Click here to read "Testing Collimation Using Shearing Interferometry," a technical brief that discusses laser beam collimating methods using an Ocean Optics Shear-Plate Collimation Tester.