| 摘要 |
<p>A handheld device for infrared reflectance measurements of samples (M) for identification of the sample materials is a self-contained portable unit built into a handheld housing (10). The housing (10) includes a window (15) and optics on a bench (100) adjacent the window (15), so that the optics will be aligned with the sample (M) when the device is placed directly against the sample (M). The optics include a broad-band IR light source (110) shining onto an acousto-optic tunable filter (AOTF) (120), which passes narrow-band IR light with a swept frequency; a lens (130) focussing the IR through the window (15) onto the sample (M); and a reflectance detector (140) aligned with the window (15) of the housing (10) to detect reflected light. A computer (202), which may be mounted in the housing (10), compares the detected reflectance spectrum with stored sample data spectra, and identifies the material (M) or the components of the material (M) and their proportions.</p> |
