| 摘要 |
PURPOSE:To obtain a rotatory polarizer which is free from deviation between input light and exit light by constituting said polarizer of the junction of two parts. CONSTITUTION:The respective parts of a right triangular prism 4 made of a levo-rotatory crystal and a trapezoidal column 5 made of a dextro-rotatory crystal are so arranged that the horizontal right and left directions are in the optical axis direction of the crystals. The base BE of the prism 4 and the top (with AD as the base of the trapezium) EC of the column 5 are equal in length. The length of the base AD of the trapezium is twice the length of the top EC. The slant of the prism 4 and the slant of the column 5 are joined by an optical contact method without using any adhesive agent, and both are joined to the shape of a rectangular parallelopiped. When light is made incident as shown by an arrow from the AB of the two faces AB, CD sandwiching the joined surface AE, the light advances rectilinearly and emits from the face CD. Since both the levo-rotary and dextro-rotary crystals have an equal refractive index, no refraction arises even if the light passes through the face AE diagonally. |
