- Chang Dae Hi-tech
- Address:604b-13, Banweol Industrial Region, Sunggok-dong
- The Zone Systems Inc.
- Address:
- Daiichi Optical Co., Ltd.
- Address:26-20,Ho-dong ,Jung-gu
- SU OPTICS
- Address:Palyong-Dong 58-4
- Samyang Optics Co., Ltd.
- Address:654-4 Bongam-dong,Bongam-dong ,Masan-si
- SAMSUNGEYETECH CO., LTD
- Address:466-2 donghuyn-ri, Changki-myun
- Migreen Optical
- Address:1696-1,Sinil-dong ,Daedeok-gu
- OPTONICS
- Address:namdong-gu nonhyun-dong 443-1
- Young Shin Corporation
- Address:#302 Chungyong Bldg.
- Green & Glass Optical co.,ltd
- Address:1f, 485-2 songchon-dong, daedeok gu
- PAKKOREA INTL TRADING CO.LTD
- Address:50-32shin dang 6-dong chungku
- Covis Optic Co., Ltd.
- Address:922-1,Samcheong-ri,Okcheon-eup ,Okcheon-gun
- Microptics Co.,Ltd.
- Address:5F, Yunmin Techno Town, 473-4, Bora-dong, Giheung-gu,
- AGoptics
- Address:731-8 Ancheong Dong, Gwansan-Gu
- Optron-Tec. Inc.
- Address:Paryong-dong,Paryong-dong ,Changwon-si
- Sekonix Co., Ltd.
- Address:146-16, Sangbongarm-Dong
- DREAMCON CO., LTD.
- Address:# 469-1 Sanmak Dong
- Sectron Co., Ltd
- Address:120-1, Dongsun Bldg, Chunui-dong, Wonmi-gu
- Havit Information Co., Ltd.
- Address:59-3,Jang-dong ,Yuseong-gu
- Micro Optics Co., Ltd
- Address:473-4 Bora-ri, Giheung-gu, Yongin-si