Image pickup apparatus and camera module
An image pickup apparatus includes an optical sensor including a light receiving unit, a sealing material configured to protect the optical sensor on a side of the light receiving unit, an intermediate layer formed at least between the light receiving unit and a first surface of the sealing material, the first surface being an opposed surface to the light receiving unit, and a control film configured to cause a cutoff wavelength to shift to a short wave side in accordance with an incident angle of light that is incident thereon obliquely, in which the control film includes a first control film formed on the first surface of the sealing material, the first surface being the opposed surface to the light receiving unit, and a second control film formed on a second surface of the sealing material, the second surface being opposite to the first surface.
1. An image pickup apparatus, comprising:
an optical sensor including a light receiving unit;
a sealing material configured to protect the optical sensor on a side of the light receiving unit;
an intermediate layer formed at least between the light receiving unit and a first surface of the sealing material, the first surface being an opposed surface to the light receiving unit; and
a control film configured to cause a cutoff wavelength to shift to a short wave side in accordance with an incident angle of light that is incident thereon obliquely, wherein
the shift of the cutoff frequency satisfies the following condition:
λ CF (θ)=λ CF (0)*cos(θ)
where θ represents the incident angle, λCF(θ) represents the cutoff wavelength of the incident angle θ, and λCF(0) represents the cutoff wavelength of the incident angle 0 degrees, and
the control film includes a first control film that is a multilayer film formed on the first surface of the sealing material, the first surface being the opposed surface to the light receiving unit, and a second control film formed on a second surface of the sealing material, the second surface being opposite to the first surface.
2. The image pickup apparatus according to claim 1 , wherein
the first control film includes a function as an infrared cut filter configured to cut off light in an infrared region.
3. The image pickup apparatus according to claim 1 , wherein
the control film is formed of a multilayer film of a plurality of films, refractive indexes of which are different, and
the first control film and the second control film are formed by sorting the number of films so that a stress of a warp is balanced.
4. The image pickup apparatus according to claim 3 , wherein
the multilayer film is obtained by disposing two or more kinds of film materials with a film material having a high refractive index and a film material having a low refractive index being alternated in a stated order.
5. A camera module, comprising:
an optical sensor including a light receiving unit;
a sealing material configured to protect the optical sensor on a side of the light receiving unit;
an intermediate layer formed at least between the light receiving unit and a first surface of the sealing material, the first surface being an opposed surface to the light receiving unit;
a control film configured to cause a cutoff wavelength to shift to a short wave side in accordance with an incident angle of light that is incident thereon obliquely; and
a lens configured to form a subject image on the light receiving unit of the optical sensor, wherein
the shift of the cutoff frequency satisfies the following condition:
λ CF (θ)=λ CF (0)*cos(θ)
where θ represents the incident angle, λCF(θ) represents the cutoff wavelength of the incident angle θ, and λCF(0) represents the cutoff wavelength of the incident angle 0 degrees, and
the control film includes a first control film that is a multilayer film formed on the first surface of the sealing material, the first surface being the opposed surface to the light receiving unit, and a second control film formed on a second surface of the sealing material, the second surface being opposite to the first surface.
6. The camera module according to claim 5 , wherein
the first control film includes a function as an infrared cut filter configured to cut off light in an infrared region.
7. The camera module according to claim 5 , wherein
the control film is formed of a multilayer film of a plurality of films, refractive indexes of which are different, and
the first control film and the second control film are formed by sorting the number of films so that a stress of a warp is balanced.
8. The camera module according to claim 7 , wherein
the multilayer film is obtained by disposing two or more kinds of film materials with a film material having a high refractive index and a film material having a low refractive index being alternated in a stated order.