| abstract |
[PROBLEMS] To prevent cracking, hardly deteriorate with time, and not to transmit near infrared rays in a wide angle range, and at low cost, while improving color purity, improving contrast, improving brightness, and reducing power consumption. An optical filter suitable for a display device such as a plasma display, a field emission display, or an organic electroluminescence, an image photographing device such as a camera, a digital camera, or a scanner, or a solid display element such as a CCD. An average reflectance of a near infrared band of 850 to 1000 nm, comprising a laminated film having at least 30 layers and having a layer made of resin A (A layer) and a layer made of resin B (B layer). Is an optical filter characterized by satisfying the following formulas a and b. T (630 nm) −T (595 nm) ≧ 20% Formula a T (370 nm) ≦ 5% Formula b T (x nm): Transmittance at wavelength x nm. [Selection] Figure 5 |