型號(hào) 90/03   No. 90/03 小型手持式   Small handy model 光源：用2個(gè)1.5V電池     Light source: using two pieces 1.5V batteries (mono-cells) 分析器直徑：                                   40 mm 偏光器直徑：                                   40 mm 偏光器和分析器之間較大距離：      約 200 mm                                                           偏光器和分析器之間的距離可以通過接頭調(diào)整     Diameter of analyzer:                                              40 mm Diameter of polarizer:                                              40 mm Max. distance between analyzer and polarizer:                                                                       appr. 200 mm The distance between analyzer and polarizer can be adjusted via joint.