Optical lens assembly, imaging apparatus and electronic device
An optical lens assembly includes at least one optical element. At least one of the at least one optical element includes a multi-layer coating membrane, and the multi-layer coating membrane is formed by alternately stacking high refractive index layers and low refractive index layers. The multi-layer coating membrane is a dual-bandpass filtering membrane.
1 . An optical lens assembly, comprising:
at least three optical elements;
wherein at least one of the at least three optical elements comprises a multi-layer coating membrane, the multi-layer coating membrane is formed by alternately stacking high refractive index layers and low refractive index layers, the optical element comprising the multi-layer coating membrane is an optical lens element, the optical lens element is made of a glass material, and at least one of the at least three optical elements comprises a long-wavelength absorbing material;
wherein the multi-layer coating membrane is a dual-bandpass filtering membrane;
wherein a total number of layers of the multi-layer coating membrane is tLs, an average transmittance in a wavelength range of 450 nm-630 nm of the optical element comprising the multi-layer coating membrane is T4563, an average transmittance in a wavelength range of 830 nm-870 nm of the optical element comprising the multi-layer coating membrane is T8387, a slope from a center position to a position of a maximum horizontal displacement of the optical lens element is SPmax, and the following conditions are satisfied:
65≤ tLs≤ 200;
80%≤ T 4563;
80%≤ T 8387; and
7.5<| SP max|.
2 . The optical lens assembly of claim 1 , wherein at least one of the at least three optical elements is an optical lens element, a slope from the center position to a position of a maximum effective diameter of the optical lens element is SPsd, and the following condition is satisfied:
7.5≤|SPsd|.
3 . The optical lens assembly of claim 2 , wherein the slope from the center position to the position of a maximum horizontal displacement of the optical lens element is SPmax, and the following condition is satisfied:
7.6≤| SP max|
4 . The optical lens assembly of claim 3 , wherein when the position of the maximum effective diameter and the position of the maximum horizontal displacement of the optical lens element are different, a slope from the position of the maximum horizontal displacement to the position of the maximum effective diameter of the optical lens element is SPbi, and the following condition is satisfied:
7.5≤|SPbi|.
5 . The optical lens assembly of claim 4 , wherein the average transmittance in the wavelength range of 450 nm-630 nm of the optical element comprising the multi-layer coating membrane is T4563, and the following condition is satisfied:
90%≤ T 4563.
6 . The optical lens assembly of claim 5 , wherein the average transmittance in the wavelength range of 830 nm-870 nm of the optical element comprising the multi-layer coating membrane is T8387, and the following condition is satisfied:
90%≤ T 8387.
7 . The optical lens assembly of claim 6 , wherein a transmittance at a wavelength of 850 nm of the optical element comprising the multi-layer coating membrane is T85, and the following condition is satisfied:
90%≤ T 85.
8 . The optical lens assembly of claim 7 , wherein an average transmittance in a wavelength range of 700 nm-760 nm of the optical element comprising the multi-layer coating membrane is T7076, and the following condition is satisfied:
T 7076≤1%.
9 . The optical lens assembly of claim 8 , wherein a total thickness of the multi-layer coating membrane is tTk, and the following condition is satisfied:
5000 nm≤ tTk≤ 10000 nm.
10 . The optical lens assembly of claim 9 , wherein the multi-layer coating membrane comprises at least one of the low refractive index layers, the multi-layer coating membrane comprises at least one of the high refractive index layers, a total thickness of the low refractive index layer is LtTk, a total thickness of the high refractive index layer is HtTk, and the following condition is satisfied:
1.0≤LtTk/HtTk≤1.5.
11 . The optical lens assembly of claim 1 , wherein the multi-layer coating membrane comprises at least one of the low refractive index layers, the multi-layer coating membrane comprises at least one of the high refractive index layers, a refractive index of the high refractive index layer is NH, a refractive index of the low refractive index layer is NL, the total number of layers of the multi-layer coating membrane is tLs, a total thickness of the low refractive index layer is LtTk, a total thickness of the high refractive index layer is HtTk, the average transmittance in the wavelength range of 450 nm-630 nm of the optical element comprising the multi-layer coating membrane is T4563, the average transmittance in the wavelength range of 830 nm-870 nm of the optical element comprising the multi-layer coating membrane is T8387, a transmittance at a wavelength of 850 nm of the optical element comprising the multi-layer coating membrane is T85, an average transmittance in a wavelength range of 700 nm-760 nm of the optical element comprising the multi-layer coating membrane is T7076, and the following conditions are satisfied:
1.9≤ NH;
NL< 1.9;
80≤ tLs≤ 150;
1.2≤LtTk/HtTk≤1.5;
95%≤ T 4563≤100%;
95%≤ T 8387≤100%;
95%≤ T 85≤100%; and
T 7076≤0.5%.
12 . An imaging apparatus, comprising:
the optical lens assembly of claim 1 ; and
an image sensor disposed on an image surface of the optical lens assembly.
13 . An electronic device, comprising:
the imaging apparatus of claim 12 .