hydrogen lamp การใช้

• However, Beckman was still unsatisfied with the available hydrogen lamps.
• National Technical Laboratories designed its own hydrogen lamp, an anode enclosed in a thin blown-glass window.
• Beckman had previously attempted to find a source of reliable hydrogen lamps, seeking better sensitivity to wavelengths in the ultraviolet range than was possible with tungsten.
• The tungsten lamp was suitable for transmittance of wavelengths between 320 and 1000 millimicrons; the hydrogen lamp for 220 to 320 millimicrons, and the mercury lamp for checking the calibration of the spectrophotometer.