Barothermal Theory of Two Devices for Measuring Absorption Coefficients
نویسنده
چکیده
T wo de vices a re pro posed fo r measuring a bsorpti on coe ffi c ie nts in wea kly a bsorb ing mate ri a ls . The fir s t d e vice me as ures c ylindri cal s a mples a nd th e seco nd de vi ce meas ures fla t pla te o r di s k sa mples. Thi s pa pe r re port s on th e de ri va ti ons fo r t he s tea d y·s ta te a nd tr a ns ie nt so luti uns to t.h e hea t diffu s io n equ a tiuns whic h d esc ribe t he ba rothe rm a l be ha vi or of the t wo proposed de vices . In addi tio n, G ree n' s fun c tio n ~ ec hniques a re used to d esc ribe t.h e c ycl ic he atin g a nd cooling of the c ylinde rs a nd pl a tes .
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