[New PS3 Teardown (7)] Blu-ray Disc Device Gets Smaller

The three-terminal element seen in the lower left seems to be a blue-violet semiconductor laser, and the four-terminal element seen in the lower right is probably a two-wavelength laser for CDs and DVDs. In this structure, light from the blue-violet semiconductor laser is reflected from a mirror placed right in front of the laser, goes to another mirror in the upper center of the picture (a bluish part) and exits in the direction of the objective lenses (outward journey). In a homeward journey, light reflected from the recording surface of an optical disc passes through the objective lens and is refracted by the bluish mirror. And the light goes straight to the light receiving element seen in the left. Also, light from the two-wavelength laser seems to follow a similar path. In its outward journey, the light is reflected from a mirror placed right in front of the two-wavelength laser, goes to another mirror in the lower center of the picture (a yellowish part) and exits in the direction of the objective lenses. In its homeward journey, light reflected from the recording surface of an optical disc passes through the objective lens, is refracted by the yellowish mirror and goes straight to the light receiving element seen in the right. (Estimated by Nikkei Electronics)

The three-terminal element seen in the lower left seems to be a blue-violet semiconductor laser, and the four-terminal element seen in the lower right is probably a two-wavelength laser for CDs and DVDs. In this structure, light from the blue-violet semiconductor laser is reflected from a mirror placed right in front of the laser, goes to another mirror in the upper center of the picture (a bluish part) and exits in the direction of the objective lenses (outward journey). In a homeward journey, light reflected from the recording surface of an optical disc passes through the objective lens and is refracted by the bluish mirror. And the light goes straight to the light receiving element seen in the left. Also, light from the two-wavelength laser seems to follow a similar path. In its outward journey, the light is reflected from a mirror placed right in front of the two-wavelength laser, goes to another mirror in the lower center of the picture (a yellowish part) and exits in the direction of the objective lenses. In its homeward journey, light reflected from the recording surface of an optical disc passes through the objective lens, is refracted by the yellowish mirror and goes straight to the light receiving element seen in the right. (Estimated by Nikkei Electronics)

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