International Inquiries

Optima Corp.

Tel: 81-3-5667-3051

Fax: 81-3-5667-3050

South Korea


Tel: 82-32-321-7748

Fax: 82-32-321-7749

Mobile: 82-10-4331-2979


Worldwide Technology (S.H.) Co., Ltd.

Tel:  +86-21-66621556/57/58/59*8010

Tel:  +86-21-66621556/57/58/59*8048

Mobile :  0086-13122376180

General Inquiries 

If you would like to speak with us directly, please feel welcome to call us at:  1 (705) 733-3633 between 8:30 am to 4:30 pm (UTC-5).

You can also email us at:

For purchasing and technical information please use the form on this page.

Light Sources, Spectrometers, Monochromators, Detectors , Components and Systems from Extreme Ultraviolet (EUV) to Infrared (IR)

Resonance Ltd  | Telephone (705)733-3633