Feature Highlights | Compare Editions | Optical System Setup | OSLO Optimization | Source & Illumination Analysis | Import/Export | Catalogs and Libraries | Advances Features | Zooms | Tolerancing | Standard Analysis
OSLO is a large program, with thousands of internal commands and functions. Moreover, the executable module of OSLO is routinely modified and recompiled by users. As a result, it is not possible to give a complete list of specifications for what the program can do. The links in the list below provide a survey of the features in OSLO, but OSLO has many more capabilities. If you have a question about a specific capability, explore our web site or contact Lambda Research directly. View the OSLO brochure in pdf format.
OSLO's major features include
Although many optical design programs appear to be similar, there are big differences in their capabilities and design approaches. OSLO is a mainstream optical design program that has consistently shared top honors in optical design "contests." Although OSLO has a heritage that traces back to the early 1960's, in its current implementation it is an object-oriented windows program, with a unique built-in application manager/compiler that provides extremely high performance on desktop computers.
Designer-Oriented Design. OSLO stresses interactive optical design, in which the computer provides easily understood feedback to the designer. This allows the designer to make critical trade-off decisions that produce superior solutions. OSLO is unique in its use of interactive design controls that make the user interface intuitive to use.
Power and Accuracy. OSLO uses advanced optical design technologies, including a selection of optimization and tolerancing methods, high-performance non-sequential ray tracing, and stochastic source modeling and analysis. OSLO was the first program used for serious optical design on desktop computers, and it has been developed far more extensively than other software.
Flexibility. A prime reason that OSLO has become the tool of choice for leading designers around the world is that it is easy to customize and adapt the program to specific needs. The reason for this is that OSLO uses advanced software technologies to bring the power of Windows into the realm of technical computing. In fact, the CCL language supplied with OSLO compares to Sun's Java or Microsoft's Visual Basic for Applications rather than to the simple macro languages supplied with other optical design software.
Three editions of OSLO are available to most cost effectively accommodate design needs. Please contact an applications engineer for assistance in selecting an edition of OSLO that best meets your specific requirements. The table below has an overview of the features available in each edition of OSLO.
OSLO EDITIONS FEATURE SUMMARY
General Surface Properties
|3D optics (tilts & bends using local or global coordinates on all surfaces)||Yes||Yes||Yes|
|Unlimited number of surface, variables & optimization targets||Yes||Yes||Yes|
|Test plate libraries||Yes||Yes||Yes|
|Test plate analysis and ranking||Yes||Yes|
|Non-sequential groups, regular and tabular arrays||Yes|
|Spheres, aspheres, conics, polynomial aspheres||Yes||Yes||Yes|
|Cylindrical, toroidal, splines, axicons, Zernikes||Yes||Yes||Yes|
|Fresnels, ISO 10110 asphere, cones||Yes||Yes||Yes|
|Hologram, gratings, binaries||Yes||Yes||Yes|
|Axial, radial GRIN or Wood, Selfoc or Gradium lens||Yes||Yes||Yes|
|User defined gradient, sag, eikonal or diffractive surface||Yes|
|Astigmatic source, telecentric source, Arc, LED & Lambertian||Yes||Yes||Yes|
|Independent X and Y Gaussian distributions and Radiant Imaging data||Yes||Yes||Yes|
|Extended source shapes: cross, bar, filament, grid, slit, & user defined||Yes||Yes||Yes|
|Zoom lens design, thermal configurations, athermal design||Yes||Yes|
|Systems containing beamsplitters and multiple beam paths||Yes||Yes|
|Zoom lens optical properties analysis and comparative configuration plots||Yes||Yes|
|Curvatures, thicknesses, refractive indices & apertures, skip surfaces||Yes||Yes|
|Aspheric & special data coefficients (tilts, decenters, GRINS & diffractive)||Yes||Yes|
|Wavelengths, ray aiming mode, reference surfaces (stop, image, …etc.)||Yes||Yes|
|Aperture (NA, EPD, …etc.) and field of view||Yes||Yes|
Starting design libraries
|OSLO demos & examples (40 lenses), vendor lens catalogs (192+ lenses)||Yes||Yes||Yes|
|Arthux Cox, Ellis Betensky, and Warren Smith libraries (705 lenses)||Yes||Yes|
|Non-sequential & special examples (37 lenses)||Yes|
Fiber coupling efficiency
|Single-mode coupling with stepped-index or Gaussian-mode fibers||Yes||Yes||Yes|
|Efficiency vs. tilt or displacement||Yes||Yes||Yes|
|User-defined fiber mode||Yes|
|Autofocus for minimum paraxial focus, RMS spot size or RMS OPD||Yes||Yes||Yes|
|Damped least squares with automatic error function or user calculated operands||Yes||Yes||Yes|
|Damped least squares with pre-defined system and ray operands incl. spot size, wavefront, field sags, aberrations (3rd, 5th & chromatic), D-d, …etc.||Yes||Yes|
|Zernike, MTF, polarization and multi-layer coating property operands||Yes|
|Powell's method, simplex method and global optimization engines||Yes|
|Global Explorer and Adaptive Simulated Annealing||Yes|
|Conformal optics (Wassermann-Wolf) solve||Yes|
|Surface tolerancing on curvature, conic constant, thickness, axial shift
refractive index, X & Y tilt and decenter (all with ISO 10110 defaults)
|Component tolerances on X & Y decenter, tilt and center of curvature tilt||Yes||Yes||Yes|
|Group tolerances on axial shift, decenter, tilt and tilt about arbitrary point||Yes|
|User defined tolerancing error function with direct or inverse sensitivity and
RSS, uniform or Gaussian statistics
|Change table tolerancing using transverse spherical / axial & field D-d /
meridional & central coma / axial & field sags and RMS OPD /
best focus, back focus or focal length / direct or equal RSS contribution /
distortion, transverse distortion & lateral shear / magnification
|MTF/Wavefront tolerancing using Hopkins-Tiziani method with direct or inverse sensitivity / perturbation coefficients or direct output / statistical performance estimates||Yes|
|Monte Carlo Tolerancing with a user defined error function||Yes|
|Tolerance grades (A, B, C, D) & grade table||Yes|
|Narcissus or ghost effects, export DXF, IGES and 10110 ISO drawings||Yes||Yes||Yes|
|SCL - simple command language for automating specialized tasks||Yes||Yes||Yes|
|CCL - compiled command language (C language syntax w/ support library)||Yes||Yes||Yes|
|Spot diagrams: 7 different mono and polychromatic analyses w/ options||Yes||Yes||Yes|
|Aberration analyses: 3rd, 5th in any color / OSC calculation / 7th order spherical||Yes||Yes||Yes|
|Wavefront analysis with exact Strehl ratio (w/ apodization) / Zernike analysis / pupil map or perspective plot / RMS & peak-valley statistics||Yes||Yes||Yes|
|Point or line spread function: meridional or sagittal scan / amplitude, phase & intensity output / FFT & direct integration methods / perspective plots||Yes||Yes||Yes|
|Geometrical and diffraction based energy distribution with encircled & ensquared energy, 1/e2 & FWHM cutoff points and knife-edge scans||Yes||Yes||Yes|
|MTF(Modulation Transfer Function) - through-frequency or through-focus||Yes||Yes||Yes|
|MTF using FFT or convolution calculation / square wave input / vs. field angle||Yes||Yes|
|Gaussian beam interactive analysis: spot size, waist size & distance, wavefront radius, far-field divergence, Rayleigh range, deviation from diffraction limit (M2 factor) & plot beam spot size||Yes||Yes||Yes|
|Gaussian beam astigmatic trace: independent YZ and XZ analyses||Yes||Yes||Yes|
|Fiber coupling efficiency using overlap integral & Gaussian apodization||Yes||Yes||Yes|
|Point or line spread function using choice of Kirchhoff or Rayleigh-Sommerfeld integral / vector diffraction / DOE efficiency||Yes|
|Polarization and multilayer coating analysis||Yes|
OSLO allows you great flexibility in setting up an optical system for optimization, analysis, or tolerancing.
OSLO provides the most flexible and powerful optimization tools available, including built-in merit function generators and a choice of DLS or Lagrange-multiplier boundary constraints. OSLO Standard provides optimization of basic zoom systems. OSLO Premium has general multiconfiguration optimization for many types of complex systems.
In addition to those advanced optimization tools, OSLO's interactive design allows you to easily link any one or more system parameters (thickness, curvature, index, tilt…) to one or more analysis tools (spot diagram plot, wavefront plot, reports graphics…) through a slider. An autofocus function is available to choose an image location to minimize spot size.
There are no explicit limits on the number of variables you can define. All variables can have minimum and maximum boundary values, with independent weighting and choice of derivative increments. Available variable types include:
Each operand is defined as a weighted combination of 2 components (A > B, A + B, A*B….). Operands can be given a name, and have a show/hide output switch for display. Complicated operands can be built-up in stages, since a component can be a previously-defined operand. Operands can be assigned either constraint (Lagrange multiplier) or mimimize mode.
The OSLO error function automatically generates a real-ray based error function that minimizes RMS spot size or RMS wavefront. It lets you define and weight field and pupil points or generate them automatically. It also gives you choices on monochromatic/polychromatic and single/multiconfiguration optimization.
The GENII error function is based on a more optical approach to optimization. It is based on fewer rays and utilizes the maximum information from each ray traced.
All source models are provided with source code: you are welcome to modify them and model your own source. They also include a source files browser to easily access source information.
All OSLO programs include the ability to export your systems to CAD programs, in both DXF and IGES formats and new in OSLO 6.6 the STEP format.
Standard Windows Support
OSLO supports clipboard copying of graphics and text windows content, as well as the generation of Windows metafiles and HPGL plotter files.
Glass and Lens manufacturers
OSLO supports the catalogs released by several glass and lens manufacturers:
Append data files from commercial interferometers to any surface for advanced simulation and tolerancing.
Other Optical Design Software
OSLO imports files from the following programs:
You can search the lenses by aperture diameter, EFL, or part name and directly insert them in your current system. Available catalogs:
Using the database interface, you can:
OSLO Standard and Premium include a library of more than 800 lens prescriptions, including:
Browse all the systems in the library, sort on the category, EFL, number of elements, total length, and view its drawing and spot diagram.
The following table shows some advanced features in OSLO. Because of the large number of commands and the unique operation of OSLO, it is not possible to completely describe the program in tabular form. If you have questions about a specific capability, please contact us.
Plotting and Sorting of Results.
OSLO uses the term Zoom lens to refer to a system in which the thicknesses (spacings) between elements or element groups can have multiple values to achieve variable magnification. OSLO Standard contains routines needed for optimization of zoom lenses. OSLO Premium contains, in addition, routines for optimizing systems where practically any type of data can assume multiple values. Such systems are called multiconfiguration systems. Each configuration can be assigned a relative weight, activated/deactivated , be assigned different system data (evaluation mode, field points, ray set...). OSLO Premium also includes skip surfaces for systems containing beam splitters and multiple beam paths.
Several features have been added to Rev. 6 to improve the power and usability of OSLO for zoom and multiconfiguration design:
To evaluate how system performance will be affected by manufacturing tolerances, and help you to find the best balance between cost and performance, OSLO includes state of the art tolerancing tools:
Surface Tolerances describe the quality of each surface:
Component Tolerances describe the positioning of surfaces relative to one another:
Group Tolerances allow you to set up subsystems or elements of your overall design:
Allows you to specify an error function to characterize system performance. This method provides the greatest flexibility for tolerancing, but has the slowest performance. Since this method is based on an error function, you can select which terms to display, so that only relevant data is shown.
Change table tolerancing
This tool tells you how specific performance aspects of your system (see list below) will be affected by tolerances. It has the advantage of not requiring an error function to be defined.
This method uses the Hopkins-Tiziani algorithm, which allows you to tolerance a system based on an MTF or RMS wavefront evaluation. Although defining an error function and using User-defined tolerancing can also achieve this, MTF/Wavefront tolerancing may be as much as 100 times faster.
Monte Carlo Tolerancing
It is the closest thing to real world simulation. A number of systems are statistically generated and evaluated, giving you an accurate idea of what your rate of success is going to be.
OSLO includes features that simplify the interpretation of tolerance data:
A grade table (A, B, C, D), establishes ranges for which a tolerance is considered Very Tight (A), Tight (B), Standard (C), or Loose (D).
A display threshold can be used to suppress unimportant output.
Sorting routines allow you to find out at a glance which tolerances are critical.
OSLO allows you to chose from different tolerancing methods. Each method can be used for either analysis ("sensitivity") or design ("inverse sensitivity"), with the exception of Monte-Carlo (sensitivity only):
All graphic windows are resizable, zoomable and updatable. A recall parameters dialog box (to set field point(s), wavelength, scales...) and direct on-line help are easily accessible. Several graphical analysis routines formerly in the built-in library have now been supplied in CCL, making it easy to customize output for special requirements.