• Journal of Korean Ophthalmic Optics Society
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• v.19 no.1
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• pp.9-16
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• 2014

Purpose: In this study, we have compared and analyzed customers' and optometrists' notions regarding franchise optical shops and independent optical shops, so that this research proposes a new direction for the optical industry. Methods: A survey was conducted on 152 customer who visited optical shop and 50 optometrist in Ulsan. Results: With regard to franchise optical shop, customers answered as advantages the well-organized system and service, while as disadvantages high prices and lack of communication. The advantages of independent optical shop, on the other hand, were good communication, fair prices, professionalism, while the disdvantages were lack of service, poor interiors, old-fashioned trends. Optometrists answered that advantages of franchise optical shop were service, system, communication, and successive education, while the disadavantages were monotonous interiors, excessive events, and lack of communication. Optometrists also answered that advantages of independent optical shop were service, and communication, while the disadvantages were poor system, lack of events, poor interiors. Conclusions: We could conclude that it is reasonable for optometrists to consider the advantages of their competitors in order to enhance their communication skills and professionalism, which will promote a healthy competition between them.

• Journal of the Optical Society of Korea
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• v.17 no.6
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• pp.525-532
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• 2013

Contrary to the academic interests of other existing studies elsewhere, this study deals with how the alignment algorithms such as sensitivity or Differential Wavefront Sampling (DWS) can be better used under effects from field, compensator positioning and environmental errors unavoidable from the shop-floor alignment work. First, the influences of aforementioned errors to the alignment state estimation was investigated with the algorithms. The environmental error was then found to be the dominant factor influencing the alignment state prediction accuracy. Having understood such relationship between the distorted system wavefront caused by the error sources and the alignment state prediction, we used it for simulated and experimental alignment runs for Infrared Optical System (IROS). The difference between trial alignment runs and experiment was quite close, independent of alignment methods; 6 nm rms for sensitivity method and 13 nm rms for DWS. This demonstrates the practical usefulness and importance of the prior error analysis using the alignment algorithms before the actual alignment runs begin. The error analysis methodology, its application to the actual alignment of IROS and their results are described together with their implications.