The 8230 from ADC Corporation is a handheld optical power meter ideally suitable for R&D and production of LDs, optical pickups, and drives for optical disks. Nine kinds of optical sensors with various purpose (general-purpose/blue-violet/high-power/three-wavelength) and different shapes (thin-type/cylindrical-type) are available for this power meter. The three-wavelength optical sensors 82314B, 82324B and 82314BW are capable of measuring 405 nm, 650 nm, 780 nm wavelength ranges. The blue-violet optical sensors 82312B and 82322B have realized a flat wavelength sensitivity characteristic and low dependency on an angle of incidence in the 405 nm range. The high-power optical sensors 82313B and 82323B enable high-power measurement of up to 200 mW. The main body that has 5 1/2 digits and 0.001dB resolution display that can obtain measurement data easily by using the USB interface installed as standard.