CODE V Enewsletter

October 2016

CODE V Tip: Customizing Your Glass Catalog for Glass Expert

Glass Expert begins interactively with general questions about desired glass characteristics. You specify glass filters according to the desired manufacturer(s), availability category, refractive index range, price information, and stain resistance. With each selection, Glass Expert removes non-compliant materials, and after the glass-related questions are finished, you have a custom catalog of materials that you can use in the current Glass Expert session, and retain for future use as shown in Figure 1.

Figure 1. Glass Expert dialog to create a user catalog of materials 
after entering desired criteria.

Although Glass Expert has narrowed the number of potential materials to only materials that suit your criteria, you may want to further edit this user catalog. One beneficial change is to remove duplicate glasses that differ only in transmission. In the Schott glass catalog, the HT (High Transmission) and HTUltra versions of glasses have exactly the same chemical compositions as their non-HT counterparts; the only difference is that they are purer and thus have a higher transmission. (Ohara glasses with higher purity are designated by “W” at the end of the name.) Consequently, the index data that CODE V has for the standard, HT, and HTUltra (if available) versions are exactly the same (Figure 2).

Figure 2. Glass Expert user catalog data; NSF6, NSF6HT, and NSF6HTUltra have identical refractive index data; F2 and F2HT have identical refractive index data. In contrast, SF11 and NSF11 have different refractive index data.

During a Glass Expert run, CODE V may replace NSF6 on a surface with NSF6HT and perform a few optimization cycles. Although the glass change itself produces no difference in the ray trace, the additional optimization cycles may improve the design. Glass Expert detects the improvement, and attributes it to the material replacement. This “new” material signals Glass Expert to re-evaluate the materials on the other surfaces of the lens, extending the time for Glass Expert to complete.

The HT, HTUltra, and W glasses have higher transmission than their ordinary counterparts. Since Glass Expert can include a transmission criterion, which version of the glass should you include in your custom catalog? We suggest that you keep only the highest transmission version of each glass in your glass set (e.g., drop NSF6 and NSF6HT, but keep NSF6HTUltra; drop F2, but keep F2HT.) When you run Glass Expert with that glass set, the final design might include some HT or HTUltra glasses. If so, hand-substitute the ordinary glass for the high transmission version on one surface and run the Transmission Analysis option. If the transmission is acceptable, you can use the standard version of the glass on that surface. Repeat the process of replacing each HT glass with its ordinary version, running Transmission Analysis, and determining if the transmission is adequate for each remaining high transmission material. The Transmission Analysis option evaluates quickly, and you will know that any high transmission materials that remain in your system are needed.

CODE V Glass Catalog Updates Available for Download

Updates to the CODE V glass catalog, including the CDGM, Hikari, Hoya, Ohara, Schott and Sumita manufacturers' catalogs, are now available for download from Download links and installation instructions can be found on this page. For information about glasses affected by this update, refer to the history of CODE V glass database on our website.

Please note that the glass catalog files are in XML format, and are compatible only with CODE V version 10.8 or later.

CODE V New User Orientation Webinar

Wednesday, November 16, 2016
10:30 a.m. - 12:00 p.m. PDT (1:30 p.m. EDT) Find your local time
Duration: 1.5 hours

We invite new CODE V users to attend this orientation webinar, which will provide an overview of how to quickly get started with CODE V. We will also show you how to access resources that will help you use the software more effectively. Topics include:

  • How to obtain the latest CODE V software and license file from SolvNet
  • Overview of CODE V functionality, such as setting up a lens, performing image analysis, optimization, and tolerancing