|
KMID : 0380319720080000027
|
|
Journal of Korean Research Institute for Better Living
1972 Volume.8 No. 0 p.27 ~ p.39
|
|
|
An Optical Research on the High-order Precision-degree Measurement and Inspections
|
|
|
|
|
Abstract
|
|
|
The experimental study on the relative transmission intensity-distribution of the various moire´ fringes has been made by the use of the photometric instruments and the optical system-apparatus which are already designed and manufactured.
Also, these actual surveys were performed by means of a correlative measurement which depends on the following fadtor-changes under the minimum-deviation observing system.
S_C: slit-width of the beam-source (S_C_1=0.02mm, S_C_2=0.06mm, S_C_3=0.9mm)
S_T: slit-width in front of photomul-tube (S_T_1=0.0×0.7mm^2, S_T_2=0.7×1.0mm^2, S_T_3=1.9×0.7mm^2
t??: distance of the two Leflica gratings (t????0.125mm)
Q??: inclined angle between the two gratings (Q??=0˚^+~3.6˚)
An analytical problem of the Fringe-contrast has been evaluated by the relative measurements of the contrast coefficient C_f which is given as follows:
C_f=sin½δc_m/½δc_m=sin(msπtcosα/ω)/msπtcosα/ω
S=S_C/f_c (f_c: focal length of collimeter lens)
w: grating constant of Leflica grating (ω_1=ω_2=ω=1/592mm)
t=t????0.125mm
α: angle of incidence ray (α=0 Normal direction)
m: brazed diffraction-order (m=1)
The results showed that the transmission intensity-distribution of the fringes in general depends on the S_C and Q??: i.e. the greater the S_C and Q??(=0˚~2.6˚), the greater the intensity of the fringes will result. However, if the Q?? larger than θ=2.6˚, the transmission intensity are decressing with fringe-vanish. In this case, Fringe-contrast depends on the slit-width S_C, the lower the contrast of the fringes that will result.
All these results have been confirmed by my experiments.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|