Filter lines at a glance
Beijing Bodian Optical Technology Co., Ltd. lists its production lines as narrow band pass interference filters, fluorescence system filters, high reflection filters, beam splitting filters, color splitting filters, IR sensor interference filters, UV mirrors, neutral density filters, and special filters. Each line has its own page on this site, and each page states clearly whether specification evidence is documented for that line or whether the line is described at category level only. That distinction matters for buyers: two lines on this site carry documented specification evidence, and the rest are category pages. The two lines with documented specifications are fluorescence filters and neutral density filters. Every other filter line page tells you what the category covers and what to confirm in an inquiry, without inventing a specification table.
The company also lists prisms and lenses in its homepage headings: angle prism, aspheric lens, ball lenses, and band filters. Those products are covered at category level on the optical prism, aspheric lens, and ball lenses pages, and through the optical components overview. Sizes for these products are made to customer requirements, so the pages describe the ordering route rather than publishing a model table. If you need a model, size, or material that is not listed here, please confirm it in your inquiry before ordering.
Specification evidence, stated plainly
Fluorescence filters carry the deepest documented evidence on this site: a hard coating process, five listed excitation and emission examples, blocking performance, a slope figure, a list of dye and probe names, and a set of sizes. Neutral density filters carry a wavelength range, an ND value range, and a size rule. Those two sets of evidence belong to those two products only. They are not repeated as general claims for the whole catalogue, and they are not copied onto other product pages. A buyer reading a narrow band pass page or a beam splitting page will find a category definition and an inquiry checklist instead of a specification table, because no deep specification page has been documented for those lines. That restraint is deliberate: a specification you cannot verify is worse than a specification you are asked to confirm.
How to specify a filter on this site
Start with the application and the optical job the filter must do. Then list the parameters that decide whether a filter fits: centre wavelength or wavelength range, bandwidth or pass band behaviour, cut-off depth where it applies, size and shape, substrate material, and the quantity basis. For fluorescence filters, add the dye or probe name from the documented list. For neutral density filters, add the ND value and the wavelength range. For prisms and lenses, add the model description, size, and material you need. Then send that list through the inquiry page. Please confirm the specification, quantity basis, and delivery basis in your inquiry before ordering, because no quantity or delivery figures are published on these pages.
Company profile
Company profile states that Beijing Bodian Optical Technology Co., Ltd. was founded in the beginning of 2001, and that the company has a strong technical group with rich experience over 40 years. Those are two different statements: a founding date and an experience record. They are kept separate on this site and are never merged into a single claim about how long the company has existed. Company profile also states that the company subjects to the Optical Coating Center of Beijing Institute of Film Machine. That affiliation is presented as a company profile statement, not as an independently verified fact. Equipment names listed by the company are Optorun OTFC 1300 and Leybold Syrus 1350 automatically operated coaters, and Cary 5000 and Cary 7000 high performance spectrophotometers. Equipment names are listed as names only; no photograph on this site is presented as a photograph of that equipment. Company profile states its products achieved ISO 9001, and all other certificates are available upon request. No certificate number, issuing body, scope, or validity period is published here. Company profile states that it serves customers all over the world; no country list, region list, customer name, or customer case is published here. Telephone 010-67816596 and email [email protected] are the published contact routes. Address details are unavailable on the public pages, and no individual contact name is published.