What You Need To Know About…Quartz Crystals
- A bottom-line case for moving your lens finishing in-house. Groves, Nancy; Rothschild, Mike // Optometry Times;Mar2012, Vol. 4 Issue 3, p48
The article discusses considerations when adding in-office finishing for spectacle lens to an optical business. It cites the importance of coming up of a clear and defined business vision and goals. It provides information on the equipment needed for in-office finishing. It recommends...
- Transitions Academy. // LabTalk;Mar/Apr2008, Vol. 36 Issue 159, p40
Several images from the Transitions Academy event for optical laboratories and lens manufacturers are presented.
- THE FREE FORM DIGITAL REVOLUTION. Cohen, Stephen // LabTalk;May/Jun2009, Vol. 37 Issue 9F, p24
The author describes his vision on how digital technology revolutionizes the optical industry in 2014. He discusses how optical laboratories use digital surfacing equipment and lens design software to make the best lenses for every medical prescription. He also mentioned various tools that can...
- Edging's Evolution from Art to Science. Karp, Andrew // 20/20;Jan2007, Vol. 34 Issue 1, p91
The author discusses the advances in technology in the optical industry. He observes the changes in the process of cutting lenses through the use of pattern board which is now replaced by pattern making technology. The author agues that the utilization of patternless-edging systems have already...
- Low-frequency SMT crystal. // Electronics Now;Jul93, Vol. 64 Issue 7, p24
Presents Ralton Electronics Corp.'s Model RSM-200, tuning fork-shaped quartz crystals. Frequency generated; Packaging; Features; Applications; Availability.
- Disequilibrium partitioning of oxygen isotopes associated with sector zoning in quartz. Onasch, Charles M.; Vennemann, Torsten W. // Geology;Dec95, Vol. 23 Issue 12, p1103
Presents evidence that large variations in delta18O values in a zoned vein quartz crystal are the result of disequilibrium partitioning between fluid and crystal. Explanation on sector zoning; Factors causing disequilibrium.
- Piezoelectrically forced vibrations of rectangular SC-cut quartz plates. Lee, P.C.Y.; Lin, W.S. // Journal of Applied Physics;6/15/1998, Vol. 83 Issue 12, p7822
Provides information on a study obtaining closed form solutions of free and forced vibrations of doubly rotated SC-cut quartz plates. Methodology used to conduct the study; Information on two-dimensional first-order equations; Description of forced vibrations; Findings of the study.
- Quartz crystal microbalance setup for frequency and Q-factor measurements in gaseous and liquid... Rodahl, Michael; Hook, Fredrik; Krozer, Anatol; Brzezinski, Peter; Kasemo, Bengt // Review of Scientific Instruments;Jul1995, Vol. 66 Issue 7, p3924
Discusses the construction of an experimental setup for simultaneous measurements of the frequency, the absolute Q factor, and the amplitude of oscillation of a quartz crystal microbalance (QCM). Traditional use of the QCM in vacuum and in gaseous environments; Use of two crystals with...
- Oscillator Boasts Low Phase Noise And Aging Up To 1.5 GHz. Morrison, David G. // Electronic Design;8/19/2002, Vol. 50 Issue 17, p33
Focuses on the VFT-5 crystal oscillator that employs unique methods for frequency multiplication and for vacuum sealing the quartz crystals. High-frequency clocking requirements of Sonet and other optical networking applications; Frequencies of the device; Range of phase noise; Temperature...