Image capturing apparatus
An image capturing apparatus including a cover plate, a light source, a sensor, and a collimator is provided. The light source and the sensor are located on the same side of the cover plate. The collimator is disposed between the cover plate and the sensor, and the collimator includes collimating elements overlapping with each other. Each collimating element includes a transparent substrate and a light absorbing layer disposed on the transparent substrate. The light absorbing layer includes a plurality of light passing openings. The light passing openings expose sensing areas of the sensor. Spacing between the light passing openings is S. A width of each light passing opening is W, and W<S. A transparent substrate thickness of a first collimating element in the collimating elements is T 1 . A transparent substrate thickness of a second collimating element in the collimating elements is T 2 . The image capturing apparatus satisfies: 0.3 × W S × T 1 ≤ T 2 ≤ T 1.
1. A image capturing apparatus, comprising:
a cover plate;
a light source;
a sensor, disposed next to the light source, wherein the light source and the sensor are located on the same side of the cover plate; and
a collimator, disposed between the cover plate and the sensor and comprising a plurality of collimating elements overlapping with each other, wherein each of the collimating elements comprises a transparent substrate and a light absorbing layer disposed on the transparent substrate, the light absorbing layer comprises a plurality of light passing openings, the light passing openings expose a plurality of sensing areas of the sensor, spacing between the light passing openings is S, a width of each of the light passing openings is W, and W<S, and a transparent substrate thickness of a first collimating element in the collimating elements is T 1 , a transparent substrate thickness of a second collimating element in the collimating elements is T 2 , and the image capturing apparatus satisfies:
0.3
×
W
S
×
T
1
≤
T
2
≤
T
1.
2. The image capturing apparatus of claim 1 , wherein a plurality of indentations are formed on a surface of the transparent substrate, and the light absorbing layer is disposed in the indentations of the transparent substrate.
3. The image capturing apparatus of claim 1 , wherein the image capturing apparatus satisfies:
0.3
×
W
S
×
T
1
≤
T
2
≤
0.9
×
W
S
×
T
1.
4. The image capturing apparatus of claim 1 , wherein the image capturing apparatus satisfies:
0.9
×
W
S
×
T
1
≤
T
2
≤
T
1.
5. The image capturing apparatus of claim 1 , wherein the first collimating element is disposed between the second collimating element and the sensor.
6. The image capturing apparatus of claim 1 , wherein the second collimating element is disposed between the first collimating element and the sensor.
7. The image capturing apparatus of claim 1 , wherein the second collimating element comprises n transparent substrates overlapping with each other, a thickness of each of the n transparent substrates is less than T 1 , and a total thickness of the n transparent substrates is T 2 .
8. The image capturing apparatus of claim 1 further comprising:
a display panel, disposed between the cover plate and the collimator.
9. The image capturing apparatus of claim 3 further comprising:
a display panel, disposed between the cover plate and the collimator.
10. The image capturing apparatus of claim 4 further comprising:
a display panel, disposed between the cover plate and the collimator.
11. The image capturing apparatus of claim 8 further comprising:
a band-pass filter layer, disposed between the display panel and the sensor, wherein a light emitting spectrum of the light source falls within a transmission spectrum of the band-pass filter layer.
12. The image capturing apparatus of claim 9 further comprising:
a band-pass filter layer, disposed between the display panel and the sensor, wherein a light emitting spectrum of the light source falls within a transmission spectrum of the band-pass filter layer.
13. The image capturing apparatus of claim 10 further comprising:
a band-pass filter layer, disposed between the display panel and the sensor, wherein a light emitting spectrum of the light source falls within a transmission spectrum of the band-pass filter layer.
14. The image capturing apparatus of claim 8 , wherein the display panel is an organic light emitting diode display panel.
15. The image capturing apparatus of claim 7 , further comprising:
an adhesion layer, disposed between the n transparent substrates.
16. The image capturing apparatus of claim 3 , wherein the second collimating element comprises n transparent substrates overlapping with each other, a thickness of each of the n transparent substrates is less than T 1 , and a total thickness of the n transparent substrates is T 2 .
17. The image capturing apparatus of claim 4 , wherein the second collimating element comprises n transparent substrates overlapping with each other, a thickness of each of the n transparent substrates is less than T 1 , and a total thickness of the n transparent substrates is T 2 .
18. The image capturing apparatus of claim 16 , wherein the first collimating element is disposed between the second collimating element and the sensor.
19. The image capturing apparatus of claim 16 , wherein the second collimating element is disposed between the first collimating element and the sensor.
20. The image capturing apparatus of claim 17 , wherein the second collimating element is disposed between the first collimating element and the sensor.