Significant Suppliers and Customers	12 Months Ended
Significant Suppliers and Customers	Jun. 30, 2013
Significant Suppliers And Customers
Significant Suppliers and Customers	15. Significant Suppliers and Customers We utilize a number of glass compositions for the manufacture of our molded glass aspheres and lens array products. We purchase glass from Hikari, Ohara, CDGM and other suppliers. Base optical materials, used in both GRADIUM and collimator products, are manufactured and supplied by a number of major optical and glass manufacturers. Optical fiber and collimator housings are manufactured and supplied by a number of major manufacturers. In fiscal 2013 sales to five customers individually comprised at least 5% of our annual sales, with sales to Crimson Trace at 7%, sales to AMS Technologies AG at 10%, sales to Thorlabs at 9%, sales to Red Digital at 6% and sales to IPG Photonics at 6%. The loss of any of these customers, or a significant reduction in sales to any such customer, would adversely affect our revenues. In fiscal 2012 sales to four customers individually comprised at least 5% of our annual sales, with sales to Crimson Trace at 10%, sales to AMS Technologies AG at 9%, sales to Thorlabs at 9% and sales to Raytheon Missile Systems at 5%. The loss of any of these customers, or a significant reduction in sales to any such customer, would adversely affect our revenues.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

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