MIRROR ASSEMBLY FOR COMBINING VISIBLE LIGHTS WITH FILTER FUNCTION

1 . A mirror assembly for combining visible lights with a filter function, comprising:

a first mirror configured to pass a first color light therethrough and reflect a second color light, said first color light traveling in a first direction, said first mirror extending in a direction non-perpendicular to said first direction and having an average transmittance (T 1 ) of light with a wavelength of 380 nm to 420 nm, T 1 being less than or equal to 8% (T 1 ≦8%) or greater than or equal to 95% (T 1 ≧95%); and

a second mirror disposed at one side said first mirror and extending in a direction non-perpendicular to said first direction, said second mirror being configured to reflect said first color light and said second color light from said first mirror and to pass a third color light therethrough so as to mix said third color light with said first and second color lights, said second mirror having an average transmittance (T 2 ) of light with a wavelength of 380 nm to 420 nm, T 2 being less than or equal to 8% (T 2 ≦8%) or greater than or equal to 95% (T 2 ≧95%);

wherein said first color light, said second color light, and said third color light are combined at one side of said second mirror, while light having a wavelength of 380 nm to 420 nm travels from the other side of said second mirror.

2 . The mirror assembly as claimed in claim 1 , wherein each of said first color light and said second color light includes light with a wavelength of 380 nm to 420 nm, and T 2 is greater than or equal to 95% (T 2 ≧95%).

3 . The mirror assembly as claimed in claim 2 , wherein said first color light is green, said second color light is blue, said third color light is red, said first mirror is a blue-reflecting mirror, and said second mirror is a red-transmitting mirror.

4 . The mirror assembly as claimed in claim 2 , wherein said first color light is blue, said second color light is green, said third color light is red, said first mirror is a blue-transmitting mirror or a green-reflecting mirror, and said second mirror is a red-transmitting mirror.

5 . The mirror assembly as claimed in claim 1 , wherein one of said first color light and said second color light includes light with a wavelength of 380 nm to 420 nm, said third color light includes light with a wavelength of 380 nm to 420 nm, and T 2 is less than or equal to 8% (T 2 ≦8%).

6 . The mirror assembly as claimed in claim 5 , wherein said first color light is red, said second color light is blue, said third color light is green, said first mirror is a blue-reflecting mirror or a red-transmitting mirror having T 1 that is greater than or equal to 95% (T 1 ≧95%), and said second mirror is a green-transmitting mirror.

7 . The mirror assembly as claimed in claim 5 , wherein said first color light is blue, said second color light is red, said third color light is green, said first mirror is a blue-transmitting mirror or a red-reflecting mirror having T 1 that is less than or equal to 8% (T 1 ≦8%), and said second mirror is a green-transmitting mirror.

8 . The mirror assembly as claimed in claim 5 , wherein said first color light is green, said second color light is red, said third color light is blue, said first mirror is a red-reflecting mirror, and said second mirror is a blue-transmitting mirror.

9 . The mirror assembly as claimed in claim 5 , wherein said first color light is red, said second color light is green, said third color light is blue, said first mirror is a red-transmitting mirror or a green-reflecting mirror, and said second mirror is a blue-transmitting mirror.

10 . The mirror assembly as claimed in claim 6 , wherein said first mirror is a blue-reflecting mirror having an average transmittance of less than 95% for light with a wavelength of 500 nm to 570 nm.

11 . The mirror assembly as claimed in claim 6 , wherein said first mirror is a red-transmitting mirror having an average transmittance of greater than 5% for light with a wavelength of 500 nm to 570 nm.

12 . The mirror assembly as claimed in claim 7 , wherein said first mirror is a red-reflecting mirror having an average transmittance of less than 95% for light with a wavelength of 500 nm to 570 nm.

13 . The mirror assembly as claimed in claim 7 , wherein said first mirror is a blue-transmitting mirror having an average transmittance of greater than 5% for light with a wavelength of 500 nm to 570 nm.

14 . A mirror assembly for combining visible lights with a filter function, comprising:

a first mirror that reflects a first color light toward a combined direction and that has an average transmittance of less than or equal to 8% of light with a wavelength of 380 nm to 420 nm; and

a second mirror that intersects said first mirror, that reflects a second color light toward said combined direction, and that has an average transmittance of less than or equal to 8% of light with a wavelength of 380 nm to 420 nm;

wherein a third color light passes through said first mirror and said second mirror in said combined direction to combine with said first color light and said second color light.

15 . The mirror assembly as claimed in claim 14 , wherein said mirror assembly is an X-plate.

16 . The mirror assembly as claimed in claim 14 , wherein said first color light is blue, said second color light is green, said third color light is red, said first mirror is a blue-reflecting mirror, and said second mirror is a green-reflecting mirror.

17 . The mirror assembly as claimed in claim 14 , wherein said first color light is blue, said second color light is red, said third color light is green, said first mirror is a blue-reflecting mirror, and said second mirror is a red-reflecting mirror.

18 . The mirror assembly as claimed in claim 14 , wherein said first color light is green, said second color light is red, said third color light is blue, said first mirror is a green-reflecting mirror, and said second mirror is a red-reflecting mirror.