METHOD FOR MANUFACTURING CROSS DICHROIC PRISM, CROSS DICHROIC PRISM AND PROJECTION TYPE DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a highly precise cross dichroic prism. SOLUTION: The method for manufacturing a cross dichroic prism includes a first joining process to bring the side face M2 of a first right angle prism 101L and the side face N2 of a third right angle prism 103S into contact with the top flat faces of a plurality of small projections (t11 to t14, t21 to t24) each having a small contact area, and a second process to bring the side face M1 of the first right angle prism 101L and the side face M1 of the second right angle prism 102L into contact with the top flat faces of a plurality of small projections (t31 to t34, t41 to t44) each having a small contact area.