Calendar
SPIE Optics and Photonics
August 1-5, 2010
San Diego, California
More information
Introduction to CODE V
September 13-17, 2010
Pasadena, California
More information
Advanced Topics in CODE V
September 20-24, 2010
Pasadena, California
More information
Introduction to CODE V
November 8-12, 2010
Munich, Germany
Contact OEC
Advanced Topics in CODE V
November 8-12, 2010
Munich, Germany
Contact OEC
For a complete list of CODE V events worldwide, visit our Web site:
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CODE V Tip – New Macro for Calculating MTF Using Beam Propagation Data
Diffraction-based MTF in CODE V is calculated using an auto-correlation integral of the pupil function.* This method works well for most optical systems. However, for systems where the entrance pupil cannot be directly mapped to the exit pupil, the auto-correlation method cannot be used. Examples of such systems include the Large Binocular Telescope (LBT) where two apertures are combined to form one image, and systems where parts of the pupil are flipped or rotated, as illustrated in the double-dove prism example below.
Dove Prism Example with Segmented Pupil
ORA's Technical Support Team has created a new macro, BSP2DMTF.seq, for calculating the MTF of nearly any optical systems. This macro takes the output of CODE V’s Beam Synthesis Propagation (BSP) to obtain the PSF of the system, and then performs a Fourier Transform of the PSF to calculate the MTF. The macro can calculate and plot the standard MTF vs. spatial frequency as well as calculate the 2D MTF.
Examples of using this macro are described in a presentation given last month at the 2010 CODE V User Group Meetings. This presentation, "Using BSP to Calculate 2D MTF," as well as the BSP2DMTF.seq macro, are available for download from ORA’s Customer Support Web Site, www.oraservice.com. Four separate examples of using BSP to calculate MTF are included in the presentation. Sample files of each example are also available for download.
*H.H. Hopkins, Proc. Phys. Soc., 70, B 1002 [1957]
IODC Design Contest Winners
Congratulations to CODE V user Rob Bates, of FiveFocal LLC, for winning the 2010 IODC design contest for imaging systems! ORA's Jeff Hoffman and John Isenberg placed second and third, respectively.
ORA's Bill Cassarly took home first place in the illumination design contest using LightTools.
2010 CODE V User Group Meetings
The 2010 CODE V User Group Meetings were held last month in Pasadena, San Jose, and Rochester. Thank you to all the CODE V users who attended these events. Post-event surveys were positive. For those unable to attend, copies of presentations from the meetings are now available on ORA's Customer Service Web Site, www.oraservice.com, under CODE V Support > User Group Presentations. These presentations include:
- Using BSP to Calculate MTF (as described above)
- Using the Glass Expert Macro
- Tips & Tricks from Tech Support
- ORA Engineering: Designing with Aspheres
- Approaches for Solving the 2010 IODC Design Problem
Updates to the Customer Support Web Site
The following updates have been made to the ORA Customer Support Web Site, www.oraservice.com, under CODE V Support:
- The five CODE V User Group presentations referenced above are available under User Group Presentations. Also available are supporting and example files from the presentations, including the BSP2DMTF.seq macro.
- A new standalone utility, AsphereConverter.exe, which can be used to convert between the standard power-series asphere (ASP) and the new Forbes polynomial aspheres (QCON, QBSF), is available for download under Macro and User-defined Feature Downloads > Forbes Polynomial Asphere.
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