Optical head for optical recorder/reproducer

An optical head for recording and/or reproducing a signal on an optical recording medium, the optical head comprising:

• a light source that emits light of less than or equal to 450 nm wavelength;
• an objective lens that condenses light emitted from said light source onto the optical recording medium;
• and
• a light separator that is disposed between said light source and said objective lens on a light path of the emitted light and separates the emitted light from reflected light which is emitted from said light source and reflected by the optical recording medium,
• wherein said light separator includes:
• a first glass;
• a multilayer film that is formed on said first glass;
• an adhesive layer that is arranged on said multilayer film;
• a second glass that is fixed on said multilayer film by an adhesive bonding provided by said adhesive layer;
• the emitted light emitted from said light source enters and transmits through said first glass and transmits through said first glass again after a total reflection on said multilayer film and then transmits through said light separator;
• and
• the reflected light reflected by the optical recording medium enters said light separator from a side of said first glass and transmits through said light separator in an order from said first glass, said multilayer film, said adhesive layer, to said second glass.