Powers OpTest metrology benches and LensCheck instruments
At its core, OpTest 7 is a software application that integrates with all OpTest metrology benches, including the LensCheck instruments, to control electronic hardware assemblies including all motorized motion elements, to acquire and analyze video and scanning detector signals, and to present the measurement results to the user in a graphical manner. OpTest 7 runs under Windows 7 and includes a licensed version of Microsoft Excel with each installation. All measurement data may be exported directly to formatted Excel workbooks for easy inclusion in customer reports, etc.
Sophisticated measurements for a wide range of users
Drawing on a tried and tested legacy of over 20 years of Optikos® MTF measurement software, OpTest 7 is an entirely fresh approach to the problem of making a sophisticated measurement technique accessible to a wide range of users. At the same time, the endurance of the application across future generations of operating systems has been assured by adopting the very latest Microsoft® programming environments and by coding the graphical user interface separately from the application. Typical users of the software will be completely unaware of this fact, but by carefully considering the underlying architecture we have ensured that the software will endure across new generations of operating systems.
OpTest®7 , v1.8 adds Python™ scripting and support for new OpTest modules
The OpTest 7 flexible platform allows a wide range of measurements; and now includes Python™ scripting using an integrated editor, while maintaining OLE support through a COM objecto in legacy programming environments, such as Microsoft Excel VBA; and also supports the new OpTest Finite Conjugate and Afocal Modules.
Easily select the interface to match your information requirements
In previous versions, the OpTest application was targeted towards engineers and presented a single interface to the operator. All of the sophistication of the controls and processing functions was exposed to anyone using the software. OpTest 7 features operating modes that are designed to match the requirements and technical sophistication of various users. This makes OpTest 7 a powerful laboratory tool in Engineering Mode, while at the same time ensuring that manufacturing operators are comfortable using it in Production Mode. Whereas earlier versions of OpTest required the use of separate macros to make measurements of focal length, field curvature, etc., the measurement of many of these first order parameters is included in OpTest 7 in a manner that makes the setup and execution easy to understand. It is now possible to perform sequences of measurements and to extract many of these measurements from a single data structure.
Users of earlier versions will notice that measurements may require less configuring than before. Instead of asking the operator to make choices regarding such things as camera gain and exposure or sampling reticle width, OpTest 7 now includes the option to make intelligent choices for you.
- MTF (Modulation transfer Function)
- Focal length
- Back and Flange Focal Length
- Chief Ray Angle
- Field tilt
- Field Curvature
- Relative Illumination
- Line of Sight
- Encircled Energy
- Axial Color
- Lateral Color
The VideoMTF ® Image Analysis Module is used in conjunction with a two-dimensional imager to provide real-time measurement of MTF. The VideoMTF ® module can be configured for use with most industry standard video format cameras to provide high-speed laboratory quality measurement capabilities. While typically used in the visible wavelength range, there are the image analyzers for the near-infrared, mid-wave infrared, and longwave infrared. A Image Analysis-based testing system is recommended for visible applications or for high-speed production testing at any wavelength. The Image Analysis Module comes equipped with the appropriate framegrabber.
VideoMTF® Revolutionizes MTF Testing
Classical MTF testing is performed by scanning a physical edge across an image produced by an optical system edge or slit. The resultant “knife-edge scan” is a graph of the amount of light passing the edge as a function of its position. The derivative of the knife-edge function is the Line Spread Function (LSF), a onedimensional profile of the image. The MTF of the system is the magnitude of the Fourier transform of the LSF. The VideoMTF® module uses an innovative acquisition technology to capture the entire image instantly. The area of interest, the image, is fixed within two rectangular “crosshairs” on the screen. The location of the crosshairs can be adjusted manually by the operator or automatically by the VideoMTF® module. The image area defined by the crosshairs is mapped into the computer memory through a framegrabber board. Two orthogonal LSFs are derived from the “grabbed” images and the MTF is calculated and graphically displayed. It all happens in a fraction of a second, and is continuously updated so that the MTF is displayed in real-time.
- Real-time measurements
- Framegrabber gain and offset control
- Background/dark current correction
- Sloping slit/edge correction
- Video camera
Allows for accurate MTF measurements of optical systems that form complex image structures, such as fiber optic faceplates.
The EROS™ Scanning Image Analysis Module
The EROS™ Scanning Image Analysis Module is used with OpTest™ mechanical scan hardware and a single element detector to perform the most flexible and demanding measurements. Image scanning is used where video image acquisition is impractical or impossible, such as in multiple wavelength range testing or at extremely high resolutions. The scanning EROS™ software can be configured for source scanning, knife-edge scanning, or image analyzer scanning depending on the capabilities of the OpTest™ hardware used with the system. The EROS™ scanning module allows complete control of scan length, number of samples, data averaging, and data filtering, making it the most powerful and flexible image analysis tool available.
- Source scanning, knife-edge scanning or image analyzer scanning
- Knife-edge function or line spread function image acquisition
- Complete control over image acquisition parameters
- Data acquisition and filtering tools
Signal acquisition, source intensity, and lock-in amplifier settings can all be monitored while scanning.
Scanning Image Analysis Module can be used in any spectral range from the ultraviolet to the long wave infrared.