Phase difference film, phase difference film piece, phase difference film set, and production method for lens part or display system

Abstract

Provided is a production method for a display system 10 that displays an image to a user. The display system 10 is provided with: a display element 12 which has a display surface that outputs light representing an image frontward through a polarization member; a reflection-type polarization member 14 which is disposed in front of the display element 12 and which reflects light that has been output from the display element 12; a first lens part 16 which is disposed on the light path between the display element 12 and the reflection-type polarization member 14, and a main surface of which has a curved surface; a half mirror 18 which is disposed between the display element 12 and the first lens part 16, which transmits light that has been output from the display element 12, and which reflects, toward the reflection-type polarization member 14, light that has been reflected by the reflection-type polarization member 14; a first λ / 4 member 20 which is disposed on the light path between the display element 12 and the half mirror 18; and a second λ / 4 member 22 which is disposed on the light path between the half mirror 18 and the reflection-type polarization member 14. The production method includes integrating, with the first lens part 16, a phase difference film which serves as the second λ / 4 member 22, which has an in-plane phase difference Re(550) is 100-190 nm, and the absolute value of the phase difference change value RS of which is not more than 2.0 (where the phase difference change value RS is the inclination of a fitted straight line of the in-plane phase difference Re(550) of the phase difference film as measured under a tension of 0 kg, 0.5 kg, 1 kg, 1.5 kg, and 2 kg).