Optical Isolation Device

An optical isolation device comprising at least one optical isolation element,

• wherein the optical isolation element comprises a first holographic element, a second holographic element, a retarder and a reflective polariscope in this order, each of which comprises a light entrance surface and a light exit surface,
• the first holographic element is an optical element capable of exiting the incident light incident on the light entrance surface at an incident angle of a first angle in a range of greater than −90 degrees and less than 90 degrees to an output angle of a second angle different from the first angle,
• the second holographic element is an optical element capable of transmitting the incident light incident on the light entrance surface or the light exit surface at an incident angle of a third angle, and reflecting the incident light incident on the light entrance surface or the light exit surface at an incident angle of a fourth angle different from the third angle in a direction parallel to the direction of the relevant incident light,
• the second to fourth angles are each in a range of greater than 0 degrees and less than 90 degrees, or in a range of greater than −90 degrees and less than 0 degrees,
• the absolute value of the difference between the second angle and the third angle is in a range of 0 degrees to 10 degrees, and
• the absolute value of the sum of the third angle and the fourth angle is in a range of 0 degrees to 10 degrees.