Rectangular Cells for Spectrophotometers Cylindrical Cuvettes for Spectrophotometers Rectangular Cuvettes for Fluorometers ow Cells and Flow Through Cuvettes Miscellaneous Cells (graded seal, dual path, magnetic stirrer ready, screw cap demountable cells and short path flow cells)
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The origin of the optical skills available from Starna, formed in 1971, can be traced back to the earlier part of the 20th century. Utilizing their optical expertise, the founders of the original company manufactured specialized optics and, during the early 1950s, had already developed the technique necessary for manufacturing the first fully fused form of spectrophotometer cells.
Starna offers five window materials, Optical Glass, Special Optical Glass and Pyrex® for the visible range, Spectrosil® Quartz for the far UV range and Infrasil® Quartz or equivalent for the near infrared. If a material required is not shown in this catalog, please contact us for availability. All materials used to construct the cells are suitable for use in the following wavelength range:
Optical Glass 334 through 2500 nm
Special Optical Glass 320 through 2500 nm
Pyrex® 320 through 2500 nm
Spectrosil® Quartz 170 through 2700 nm
Infrasil® 220 through 3800 nm
For fluorescent applications, Spectrosil® is recommended as it does not exhibit any background fluorescence. Some other materials, especially glass and lower grades of quartz may have some background fluorescence. Standard window thickness is 1.25mm, polished to a flatness tolerance of better than 4 Newton Fringes per centimeter in the viewing area. They are typically flat to better than 1 micron (0.001mm) over the whole window area. The scratch and dig specification for surface polish is 60/40. The meticulous care taken in the preparation and construction of regular quartz fluorescent cells allows for normal tolerances to be sufficiently stringent for use in laser applications.