Light beam processing apparatus and light beam processing method

1 . A light beam processing apparatus comprising:

a light source,

a polarization converter, and

a polarizer;

wherein the light source is configured to provide a first light beam that comprises:

a second light beam in a first polarization state; and

a third light beam in a second polarization state,

wherein the first polarization state and the second polarization state are orthogonal to each other, and

wherein the first light beam is transmitted to the polarizer;

wherein the polarizer is configured to transmit the second light beam and reflect the third light beam to the polarization converter,

wherein the polarization converter is configured to convert the third light beam into a fourth light beam that is used for obtaining a fifth light beam in the first polarization state,

wherein the polarizer is further configured to transmit the fifth light beam,

wherein the polarization converter is a depolarizer, and the fourth light beam comprises the fifth light beam and a sixth light beam that is in the second polarization state;

wherein the polarizer is further configured to reflect the sixth light beam to the depolarizer, and

wherein the light beam processing apparatus further comprises a fly's-eye lens that is configured to homogenize the second light beam and the fifth light beam, to obtain a homogenized second light beam and a homogenized fifth light beam.

2 . The light beam processing apparatus according to claim 1 , wherein the light beam processing apparatus further comprises an integrator lens that is configured to:

focus the second light beam and the fifth light beam, to obtain a focused second light beam and a focused fifth light beam; or

focus the homogenized second light beam and the homogenized fifth light beam, to obtain a focused second light beam and a focused fifth light beam.

3 . The light beam processing apparatus according to claim 2 , wherein the light beam processing apparatus further comprises an opto-mechanical system that is configured to:

modulate the focused second light beam and the focused fifth light beam; or

modulate the homogenized second light beam and the homogenized fifth light beam.

4 . A display system, comprising:

a light beam processing apparatus that comprises a light source, a polarization converter, and a polarizer;

wherein the light source is configured to provide a first light beam that comprises:

a second light beam in a first polarization state; and

a third light beam in a second polarization state,

wherein the first polarization state and the second polarization state are orthogonal to each other, and

wherein the first light beam is transmitted to the polarizer;

wherein the polarizer is configured to transmit the second light beam and reflect the third light beam to the polarization converter,

wherein the polarization converter is configured to convert the third light beam into a fourth light beam that is used for obtaining a fifth light beam in the first polarization state,

wherein the polarizer is further configured to transmit the fifth light beam,

wherein the polarization converter is a depolarizer, and the fourth light beam comprises the fifth light beam and a sixth light beam that is in the second polarization state;

wherein the polarizer is further configured to reflect the sixth light beam to the depolarizer, and

wherein the light beam processing apparatus further comprises a fly's-eye lens that is configured to homogenize the second light beam and the fifth light beam, to obtain a homogenized second light beam and a homogenized fifth light beam; and

a reflection apparatus that is configured to reflect a light beam projected by the light beam processing apparatus.

5 . The display system according to claim 4 , wherein

the reflection apparatus comprises an aspherical lens and/or a windshield.

6 . The display system according to claim 4 , wherein the light beam processing apparatus further comprises an integrator lens that is configured to:

focus the second light beam and the fifth light beam, to obtain a focused second light beam and a focused fifth light beam; or

focus the homogenized second light beam and the homogenized fifth light beam, to obtain a focused second light beam and a focused fifth light beam.

7 . The display system according to claim 6 , wherein the light beam processing apparatus further comprises an opto-mechanical system that is configured to:

modulate the focused second light beam and the focused fifth light beam; or

modulate the homogenized second light beam and the homogenized fifth light beam.

8 . A light beam processing method, carried out by a light beam processing apparatus comprising a light source, a polarization converter and a polarizer, the method comprising:

providing, using the light source, a first light beam that comprises;

a second light beam in a first polarization state, and

a third light beam in a second polarization state,

wherein the first polarization state and the second polarization state are orthogonal to each other, and

wherein the first light beam is transmitted to the polarizer;

transmitting the second light beam and reflecting the third light beam to the polarization converter, using the polarizer;

converting, using the polarization converter, the third light beam into a fourth light beam that is used for obtaining a fifth light beam in the first polarization state; and

transmitting, using the polarizer, the fifth light beam,

wherein the polarization converter is a depolarizer, and the fourth light beam comprises the fifth light beam and a sixth light beam that is in the second polarization state;

wherein the method further comprises:

reflecting, using the polarizer, the sixth light beam to the depolarizer, and

homogenizing, using a fly's-eye lens, the second light beam and the fifth light beam, to obtain a homogenized second light beam and a homogenized fifth light beam.

9 . The method according to claim 8 , wherein the converting the third light beam into a fourth light beam in the first polarization state comprises:

totally reflecting the third light beam, to convert the third light beam into the fourth light beam,

wherein the fourth light beam comprises the fifth light beam and a sixth light beam that is in the second polarization state; and

wherein the method further comprises reflecting the sixth light beam.

10 . The method according to claim 8 , wherein the fourth light beam comprises the fifth light beam and a sixth light beam that is in the second polarization state; and

wherein the method further comprises reflecting the sixth light beam.

11 . The method according to claim 8 , wherein the converting the third light beam into a fourth light beam comprises converting the third light beam into the fourth light beam, wherein the fourth light beam is a circularly polarized light beam; and

wherein the method further comprises converting the fourth light beam into the fifth light beam.

12 . The method according to claim 8 , wherein the light beam processing apparatus further comprises an integrator lens that is configured to:

focus the second light beam and the fifth light beam, to obtain a focused second light beam and a focused fifth light beam; or

focus the homogenized second light beam and the homogenized fifth light beam, to obtain a focused second light beam and a focused fifth light beam.

13 . The method according to claim 12 , wherein the light beam processing apparatus further comprises an opto-mechanical system that is configured to:

modulate the focused second light beam and the focused fifth light beam; or

modulate the homogenized second light beam and the homogenized fifth light beam.