1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Revenues) - USD ($)	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Revenues	$ 10,674,907	$ 9,923,355
Engineering Design Services [Member]
Revenues	2,770,481	1,390,324
Optical Components [Member]
Revenues	5,751,212	5,773,068
Medical Device Products and Assemblies [Member]
Revenues	$ 2,153,214	$ 2,759,963

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details