OPI-3XX 시리즈 Goniometer System
- Small size Goniometer System OPI-330
- Medium size Goniometer System OPI-335
- Economic Goniometer System OPI-375
- Large size Goniometer System OPI-370
- 2.4M Goniometer System OPI-378
- A type Goniometer System OPI-312
- B type Goniometer System OPI-323
- Mirror type Goniometer System OPI-380
- Absolute lumionous Flux Measurement System OPI-360
