JPH07294728A - Optical component and optical device provided with the same - Google Patents

Abstract

PURPOSE:To improve both the handleability and the degree of freedom for the design of an optical component by fitting a glass substrate on which optical multilayered films are formed to a substrate made of a material other than glass. CONSTITUTION:The glass substrate 2 on the both surfaces of which the optical multilayered films 1 are formed is stuck on the substrate 3 that has outside dimensions larger than those of the glass substrate 2 and consists of a material other than glass with the adhesive 4 such as UV-setting adhesive, thermosetting adhesive, etc. At this time, as the substrate 3 consisting of a material other than glass, a substrate in which the possibility of generating cracking or chipping is smaller than that in the glass substrate 2, e.g. a substrate consisting of a metal or high polymer material can be used. Thus, by using the substrate 3 that consists of a material other than glass and has a larger size than the glass substrate 2, the objective optical component in which cracking is hardly generated at the time of handling or fixing the component and which has improved handleability and the characteristics equivalent to those of an optical component having only a glass substrate can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical component and an optical device including the same.

[0002]

2. Description of the Related Art As a conventional optical component, there is one in which an optical multilayer film is vapor-deposited on a glass substrate and used as an interference filter or a beam splitter. This optical component is manufactured by a method in which a substance is heated, evaporated, and deposited on a glass substrate heated to several hundred degrees. By heating the substrate,
The adhesion of the optical multilayer film can be improved, and the number of layers of the multilayer film can be increased to 15 layers or more per surface. Therefore, characteristics that cannot be realized with a small number of layers can be obtained, and the degree of freedom in design is improved.

[0003]

However, in the optical component of the glass substrate, there is a possibility of chipping or cracking at the time of fixing, and there is a problem in handleability. There is also an example in which a plastic substrate is used as the substrate, but the problem is that the vapor deposition material is limited because the substrate cannot be heated, and further, the adhesion is poor and there is a limit of about 15 layers per surface. However, there is a problem that the design is limited. From the above, there is a problem in that there are restrictions on handling of glass substrates and design of plastic substrates.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an optical component improved in both handleability and design freedom, and an optical device using the same. I am trying.

[0005]

An optical component according to a first aspect of the present invention is an optical component in which a first substrate and a second substrate are bonded together with a first optical multilayer film sandwiched therebetween. The substrate is made of a material other than glass.

The optical component according to a second aspect of the invention is characterized in that the first substrate has a portion protruding from the second substrate.

An optical component according to a third aspect is characterized in that the first optical multilayer film is formed on the first substrate and the first optical multilayer film and the second substrate are bonded to each other.

An optical component according to a fourth aspect is characterized in that the first optical multilayer film is formed on the second substrate, and the first optical multilayer film and the first substrate are bonded to each other.

In the optical component described in claim 5, the first optical multilayer film is formed on both the first substrate and the second substrate,
It is characterized in that the first optical multilayer films are adhered to each other.

An optical component according to a sixth aspect is characterized in that a second optical multilayer film is further formed on the outer surface of the first substrate.

An optical component according to a seventh aspect is characterized in that a second optical multilayer film is formed on the outer surface of the second substrate.

An optical component according to claim 8 further comprises a third component.
And the second optical multilayer film is formed between the third substrate and the first or second substrate.

An optical component according to a ninth aspect is characterized in that a third optical multilayer film is formed on the outer surface of the third substrate.

An optical component according to a tenth aspect is an optical component in which a first substrate and a second substrate are bonded together with an adhesive, and a first optical multilayer film is formed on the outer surface of at least one substrate. It is characterized in that the first substrate is a substrate made of a material other than glass.

An optical component according to an eleventh aspect is characterized in that the first substrate has a portion protruding from the second substrate.

In the optical component according to the twelfth aspect, the first substrate and the second substrate have substantially the same refractive index, and the first optical element is provided between the first substrate and the second substrate. There is no multilayer film,
The difference in the refractive index between the substrate and the adhesive is 0.1 or less.

According to a thirteenth aspect of the present invention, in the optical component described above, the second optical multilayer film is formed on the outer surface of the first substrate and the second substrate on which the first optical multilayer film is not formed. It is characterized by being formed.

An optical component according to a fourteenth aspect is characterized in that the second substrate is also a substrate made of a material other than glass.

According to a fifteenth aspect of the present invention, at least one of the first substrate and the second substrate is a colored translucent substrate.

An optical component according to a sixteenth aspect is characterized in that an opening is provided in at least one of the first substrate and the second substrate.

The optical component according to the seventeenth aspect is characterized in that the first optical multilayer film and the second optical multilayer film have different wavelengths.
It is characterized by having a function of separating into two lights.

In the optical component according to the eighteenth aspect, the P-polarized component, S, and S are formed by the first optical multilayer film and the second optical multilayer film.
It is characterized by having a function of separating a polarized light component and a P / S mixed component into three lights.

An optical component according to a nineteenth aspect is characterized in that it is divided into four light beams having different properties by the first, second and third optical multilayer films.

An optical device according to claim 20 is the optical device according to claim 6.
14. An optical device comprising the optical component according to any one of 9 to 13 or 13, wherein the light incident on the optical component is reflected by a multilayer film formed at a plurality of positions, and separated into a plurality of light beams. , A plurality of light receiving portions arranged on the same side as the optical components respectively receive light.

The optical device according to claim 21 is the optical device according to claim 6.
An optical device comprising the optical component according to any one of 9 to 13 or 13, wherein a plurality of light beams emitted from a plurality of light emitting units arranged on the same side as the optical component are formed at a plurality of locations. It is characterized in that they are reflected and synthesized by different multilayer films.

The optical device according to claim 22 is the optical device according to claim 1.
It is characterized by including any one of the optical components 1 to 19.

An optical device according to a twenty-third aspect is characterized in that the optical component is attached to another device by a substrate other than a glass material among the first substrate and the second substrate of the optical component.

The optical device according to the twenty-fourth aspect is characterized in that the optical component is arranged in the divergent optical path or the convergent optical path.

An optical device according to a twenty-fifth aspect of the present invention further comprises a light receiving means for receiving the light transmitted or reflected by the optical component, and detects the physical property or state of the object.

[0030]

In the optical component having the above structure and the optical device including the optical component, the optical component of the glass substrate on which the optical multilayer film is deposited is attached to the substrate which is larger than the glass substrate and is made of a material other than glass. Therefore, handleability is improved, and the same characteristics as those of the glass substrate can be obtained. Furthermore, by stacking substrates and providing optical multilayer films at several places, color identification and polarization separation can be performed.

[0031]

Embodiments of the optical component of the present invention and an optical device having the same will be described below with reference to the drawings.

FIG. 1 shows the configuration of a first embodiment of the optical component of the present invention. In FIG. 1, a glass substrate 2 having an optical multilayer film 1 formed on both sides has a larger outer dimension than the glass substrate 2, and a substrate 3 made of a material other than glass has a UV curable adhesive or a thermosetting adhesive. It is adhered with an adhesive 4 such as. Here, the substrate 3 made of a material other than glass is
It is a substrate that is less likely to be cracked or chipped than the glass substrate 2, for example, a substrate made of metal or a substrate made of a polymer material.

According to this embodiment, since the substrate 3 made of a material other than glass is larger than the glass substrate 2, it is hard to break during handling and fixing, the handling is improved, and the conventional optical component using only the glass substrate. The characteristics equivalent to are obtained.

FIG. 2 shows the configuration of the second embodiment of the optical component of the present invention. The structure of this embodiment is similar to that of the first embodiment, but a hole 3a is formed in the central portion of the metal substrate 3. The optical component 5 configured in this way is arranged on the optical path of the light emitted from the light emitting element 6 at an angle of 45 degrees with respect to the optical axis 7, and the light reflected by the optical multilayer film 1a on the surface side is The light received by the first light receiving element 8a and reflected by the optical multilayer film 1b on the inner surface side is received by the second light receiving element 8b. The light transmitted through the optical multilayer films 1a and 1b is transmitted to the substrate 3
The light is received by the third light receiving element 8c through the hole 3a.

According to the present embodiment, transmitted light can be received similarly to the conventional optical component, and it can be used as an opening by adjusting the size of the hole 3a.

The characteristics of the optical multilayer films 1a and 1b are shown in FIG.
By selecting two of the characteristics shown in (a), (b), and (c), it is possible to realize an optical component capable of optical discrimination. Figure 3
(A), (b), (c) are blue light, green light,
It exhibits the characteristic of reflecting only red light and transmitting other color light.
For example, the characteristic of the optical multilayer film 1a is (a), the optical multilayer film 1b is
When the characteristic is set to (b), the first light receiving element 8a, the second light receiving element 8b, and the third light receiving element 8c can receive blue light, green light, and red light, respectively. Further, FIGS. 4A, 4B, and 4C are respectively shown in FIGS.
It is a characteristic curve of the transmittance and reflectance corresponding to (b) and (c).

FIG. 5 shows the configuration of a third embodiment of the optical component of the present invention. In this embodiment, a plastic substrate 11 is used as the substrate 3 made of a material other than glass shown in FIG.

According to this embodiment, the handling property is improved as in the case of the first embodiment. In addition, the optical multilayer film 1
Since the glass substrate 2 formed on both sides is adhered to the plastic substrate 11, the degree of freedom in design is improved as compared with the optical component having only the plastic substrate.

FIG. 6 shows the configuration of a fourth embodiment of the optical component of the present invention. In this embodiment, the plastic substrate 11 is
This is the case when it is made transparent such as PMMA or PC.
In this case, as in the case shown in FIG. 2, transmitted light can be used and color discrimination can be performed.

FIG. 7 shows the structure of a fifth embodiment of the optical component of the present invention. In this embodiment, two glass substrates 2a and 2b each having an optical multilayer film 1 formed on both sides are bonded to both sides of a transparent plastic substrate 11 with adhesives 4a and 4b, respectively.

With one glass substrate 2, the optical multilayer film 1 can be formed only on two surfaces, but according to this embodiment, it can be formed on four surfaces, and the degree of freedom in design is improved. Further, by using the transparent plastic substrate 11, it is possible to eliminate light loss and use it efficiently.

FIG. 8 shows the configuration of a sixth embodiment of the optical component of the present invention. In this embodiment, two transparent plastic substrates 11 each having an optical multilayer film 1 formed on both sides are laminated with an adhesive 4 and adhered.

Also in this embodiment, the degree of freedom in design is improved. If the number of stacked substrates 11 is increased to three or more, the degree of freedom in design is further improved. However, at a low temperature, the number of laminated layers is limited to 10 layers.

FIG. 9 shows the configuration of a seventh embodiment of the optical component of the present invention. In this embodiment, the glass substrate 2 and the adhesive 4,
Each of the plastic substrate 11 and the adhesive 4 has a refractive index of 0.1 or less. For example, the glass substrate 2 is BK-7 or white plate glass with n ₁ = 1.51, the adhesive is a UV curable adhesive with n ₂ = 1.5, and the plastic substrate 11 is n = 1.49. PMMA
And so on.

In general, _a material having _a refractive index n _a is converted into _a material having a refractive index n _b.
When light is incident on the substance, the reflectance R at the interface is expressed by the following equation. _{R = {(n a -n b} ) / (n a + n b)} 2 × 100 (%) ··· (1)

[0046] Thus, as the refractive index difference (n _a -n _b) it is small, the reflectivity R becomes smaller. Using each of the above substances,
The reflectance at each boundary surface is 0.001%, and there is almost no influence of reflection.

According to the present embodiment, it is possible to reduce the influence of reflection occurring at the boundary surfaces of the glass substrate 2 and the adhesive 4, and between the plastic substrate 11 and the adhesive 4, and the transmitted light of the optical multilayer film 1 and The reflected light can be used with low loss.

FIG. 10 shows the structure of an eighth embodiment of the optical component of the present invention. In this embodiment, the optical multilayer film 1 is formed on one surface of the glass substrate 2, the antireflection film 21a is formed on the other surface, and the antireflection films 21b and 21c are formed on both surfaces of the transparent plastic substrate 11, respectively. It was done.
Then, the two substrates 2 and 11 are connected to the antireflection films 21a and 2a.
It is adhered with an adhesive 4 so that 1b is in contact.

According to this embodiment, the antireflection films 21a, 21b and 21c prevent reflections between the glass substrate 2 and the adhesive 4, the adhesive 4 and the plastic substrate 11, and the plastic substrate 11 and the air. Since this is done, the influence of reflection can be eliminated even if any substrate 2, 11 is used without considering the refractive index, and the transmitted light and reflected light of the optical multilayer film 1 can be used with a small loss. .

FIG. 11 shows the configuration of the ninth embodiment of the optical component of the present invention. The structure of this embodiment is similar to that of the fourth embodiment shown in FIG. 6, but a transparent conductive film 31 is formed on the surface of the plastic substrate 11 opposite to the glass substrate 2. As a specific example of the transparent conductive film 31, ITO (Indian)
-TiN-Oxide) and _{ZAO (ZnO-Al 2 O 3} ) , and the like.

For example, when the amount of light is small, such as when the light is guided to the light receiving portion using an optical fiber, the circuit is adjusted so that a small amount of light can be detected. At this time, a minute electromagnetic wave that is not normally detected is also detected and becomes a noise component. However, by arranging the optical component according to the present embodiment between the optical fiber and the light receiving element, fixing it with the plastic substrate 11, and connecting the transparent conductive film 31 to the ground, the induction of electromagnetic waves that become a noise component is prevented. be able to.

FIG. 12 shows the structure of a tenth embodiment of the optical component of the present invention. The configuration of this embodiment has a third configuration shown in FIG.
12B, but as shown in FIG.
The film material of the layer 1a in contact with the adhesive 4 of the optical multilayer film 1 is set to H
It was fO ₂ or Hf.

When TiO ₂ is used as the film material of the layer 1a in contact with the adhesive 4 of the optical multilayer film 1, the characteristics of the optical multilayer film 1 may be changed by reacting with the moisture of the adhesive 4 and the like. HfO ₂ and H that are relatively stable to the adhesive 4
By using f, it is possible to reduce changes in the characteristics of the optical multilayer film 1 due to the adhesive 4.

The effect of the adhesive 4 can be reduced by using SiO ₂ , Zr, ZrO ₂ , a metal film or the like in addition to HfO ₂ and Hf as the film material.

FIG. 13 shows the structure of an eleventh embodiment of the optical component of the present invention. The configuration of this embodiment has a third configuration shown in FIG.
In the same manner as in Example 1, a color plastic substrate 41 having the characteristics of a long wavelength transmission filter by absorbing light in a predetermined wavelength range was used as the plastic substrate 11. When the transmittance Ta of the optical multilayer film 1 has the characteristics of a short wavelength transmission filter and the transmittance Tb of the colored plastic substrate 41 has the characteristics of a long wavelength transmission filter, the optical component 5
Has a transmittance T of Ta × Tb, which is the transmittance of the bandpass filter. FIG. 14 shows the transmittance characteristics of the optical multilayer film 1, the color plastic substrate 41, and the bandpass filter.

FIG. 15 shows an example of the configuration of an optical device including the optical component 42 according to the eleventh embodiment. In FIG. 15, the light emitted from the light emitting element 6 passes through the light projecting lens 43 and is projected onto the target object 44. When the target object 44 exists, light is reflected by the target object 44, passes through the light receiving lens 45, further passes through the optical component 42, and is received by the light receiving element 8. If the target object 44 does not exist, there is no light reflected by the target object 44 and it is not received. The presence / absence of the target object 44 is determined based on the presence / absence of the received light. At this time, since the optical component 42 has the characteristic of a bandpass filter, it is possible to reduce the reception of unnecessary light, and the optical device is resistant to ambient light.

FIG. 16 shows the structure of the twelfth embodiment of the optical component of the present invention. In the present embodiment, the first substrate 51a on which the optical multilayer film 1 is not formed is bonded to the second substrate 51b on which the optical multilayer film 1 is formed with the optical multilayer film 1 interposed therebetween. Is. Therefore, the light enters from the side of the substrate 51a, passes through the substrate 51a, and then enters the optical multilayer film 1.

In the optical multilayer film 1, the degree of change in characteristics also increases as the incident angle range of light increases. Therefore, it is difficult to design to obtain the characteristic that the incident angle dependence is small over a wide incident angle range. In the present embodiment, the incident angle β to the optical multilayer film 1 is smaller than the incident angle α directly incident to the optical multilayer film 1 of the related art because light enters the optical multilayer film 1 through the substrate 51a. . For example, assuming that the refractive index of air n ₁ = 1 and the refractive index of the substrate 51 n ₂ = 1.5 and α = 10 degrees, β = 6.6 degrees according to Snell's law n ₁ sin α = n ₂ sin β. Therefore, the incident angle range of the light on the optical multilayer film 1 becomes small, and the design for obtaining the characteristic with little dependency on the incident angle becomes easy. As a result, better characteristics can be obtained when the optical component according to the present embodiment is arranged in the divergent and convergent optical paths.

FIG. 17 shows the structure of an optical component according to a thirteenth embodiment of the present invention and an example of an optical device using this optical component. The structure of the optical component according to the present embodiment is almost the same as that of the twelfth embodiment shown in FIG.
a, 51b, 51c, and three sheets, and optical multilayer films 1a, 1b are formed between the respective substrates.
In addition, the thickness of the substrate 51b is set to 0.3 mm or less, and the optical multilayer film 1a is provided with respect to the light of the shaded portion 52a in the incident angle range θ.
Further, the optical multilayer film 1b is designed for the light of the hatched portion 52b having the incident angle θ. And this optical component 5
3 is arranged in the convergent optical path of the spread angle 2θ, and the optical multilayer film 1
The light reflected by a is received by the first light receiving element 8a, and the light reflected by the optical multilayer film 1b is received by the second light receiving element 8b.

According to the present embodiment, in addition to the effect of the twelfth embodiment shown in FIG. 16, it is possible to obtain further excellent optical characteristics. That is, when the optical component 53 is arranged in the divergent and convergent optical paths, the incident angle range can be further reduced by dividing the light having the spread angle 2θ into two.

In the conventional one-substrate structure, when the optical multilayer film 1 is vapor-deposited, if the substrate has a thickness of 0.3 mm or less, it may warp. is there. However, like the optical component 53 of the present embodiment, by sandwiching the optical multilayer film 1 between the three substrates 51 without vapor deposition, as shown in FIG. 18, the thickness b (0.3
Substrate 51b having a thickness of less than 10 mm can be used. As a result, the distance a between the light receiving elements 8a and 8b can be reduced, and the size of the optical device can be reduced by using the two light receiving elements 8a and 8b.

Further, since it is possible to use the two-divided light receiving element 8 which is composed of one chip and has a small variation in sensitivity,
It will be even smaller. Further, the light reflected by the optical multilayer films 1a and 1b can be guided to the light receiving element 8 by using an optical fiber, and the head portion can be downsized and the influence of noise can be reduced.

Although the effect of the light receiving portion in the present embodiment has been described above, the same effect can be obtained in the light emitting portion. That is, in the optical device configured as shown in FIG. 19, L as two light emitting elements in different wavelength regions is used.
The light emitted from the EDs 6a and 6b is reflected by the optical component 53 of this embodiment, passes through the light projecting lens 43, and the reflector 5 is reflected.
It is projected to 4. The projected light is reflected by the reflector 54, passes through the light receiving lens 45, and is transmitted to a PD as a light receiving element.
Light is received at 8. Here, the reflector 54 includes two LEs.
Of the light emitted from D6a and 6b, only one light is reflected. Further, the optical component 53 uses the light of the LED 6a in the optical multilayer film 1a and L in the optical multilayer film 1b.
It has the characteristic of reflecting the light of the ED 6b.

A processing system of the optical device configured as described above will be described with reference to FIG. The main oscillating circuit 61a causes the oscillating circuit 61b or 61c to oscillate with a time lag, and the LED 6a or 6b to emit light separately with a time lag to emit light, which is received by the PD 8 and converted into a current. This current is amplified by the amplifier 62 and converted into a voltage. This voltage is synchronized with the output of the oscillation circuit 61b or 61c, and the S / H (Sample hold) circuit 63a or 6
LED6 by performing sample hold in 3b respectively
The light reception signal voltage V ₁ or V ₂ of a or 6b is obtained.

Next, the subtraction circuit 64a calculates (V ₁ -V ₂ )
The adder circuit 64b calculates (V ₁ + V ₂ ). The first comparison circuit 65a compares (V ₁ −V ₂ ) with a certain threshold value Vth1 and outputs H when (V ₁ −V ₂ )> Vth1 and outputs L otherwise. In addition, in the second comparison circuit 65b,
(V ₁ + V ₂ ) is compared with a certain threshold value Vth2, and (V ₁
Outputs H when + V ₂ )> Vth2, and outputs L otherwise. Then, in the NAND circuit 66, when both are H, L is output without the target object 44, and in other cases,
H is output assuming that the target object 44 is present.

Here, the threshold value Vt of the first comparison circuit 65a
h1 is a value between (V ₁ −V ₂ ) when the target object 44 is absent and when the target object 44 is a mirror surface, and the threshold Vth2 of the second comparison circuit 65b is The value is set to be slightly smaller than (V ₁ + V ₂ ) when there is no such value.

[0067]

[Table 1]

Assuming that the light emitting outputs and the directivities of the LEDs 6a and 6b are equal to each other, when there is no target object 44, the component of the LED 6a in the reflected light from the reflector 54 is LE.
Since it is larger than D6b, as shown in Table 1, the output of the first comparison circuit 65a is H and the output of the second comparison circuit 65b is H.
Also becomes H, and it is determined that there is no target object 44. Further, when the target object 44 is a mirror surface or when there is a target object 44 having a high reflectance such as white paper in a short distance, the LED 6
The reflected light amounts of a and 6b are equal, the output of the first comparison circuit 65a is L, and it is determined that the target object 44 is present. on the other hand,
When there is a target object 44 having a low reflectance, the LEDs 6a, 6
The second comparison circuit 65b regardless of the magnitude of the reflected light amount of b.
Becomes L, and it is determined that the target object 44 is present as in the conventional case.

Therefore, even when the target object 44 has a mirror-like characteristic such as metal, and even when the target object 44 having a high reflectance such as white paper is in a short distance, the target light amount of the two reflected lights is large or small. It can be determined that there is the object 44, and the threshold value Vth2 of the second comparison circuit 65b can be lowered. Therefore, even if the installation distance of the reflector 54 is increased and the amount of received light is reduced, the reflector 54 and the target object 44 can be discriminated from each other, and the distance can be increased.

21 and 22 show an example of the configuration of an optical device for detecting the surface state of the target object 44 using the optical component 53 according to this embodiment. In the optical system shown in FIG. 21, the light emitted from the LED 6 is emitted by the projection lens 43.
After passing through, the light becomes either P-polarized light or S-polarized light by the polarization filter 55 and is projected onto the target object 44. The projected light is reflected by the target object 44, passes through the light receiving lens 45, is divided into two by the optical component 53 of this embodiment, and is received by the PDs 6a and 6b, respectively. However, optical parts 53
Divides the light from the target object 44 into P-polarized light and S-polarized light.

In the processing system shown in FIG. 22, the PD 6a,
The light received by 6b is converted into an electric current, and each is converted into an amplifier 62
The current is changed to voltages V ₁ and V ₂ at a and 62b. Next, the division circuit 67 calculates (V ₁ / V ₂ ), and the discrimination circuit 6
In step 8, (V ₁ / V ₂ ) is output as the surface state of the target object 44. At this time, when only one polarized light is projected onto the target object 44, when reflected by the target object 44, the target object 4
Polarization is disturbed due to the surface condition of No. 4, etc. The surface condition and the like can be detected by taking the ratio of the disordered states.

FIG. 23 shows the structure of a fourteenth embodiment of the optical component of the present invention. In this embodiment, two substrates 3a and 3b are used.
Are stacked to form a first optical multilayer film 1a on the surface of the substrate 3a, a second optical multilayer film 1b between the substrates 3a and 3b, and a third optical multilayer film 1c on the surface of the substrate 3b.

According to this embodiment, the light can be divided into three in the same direction, and the light receiving element can be arranged near the optical component, so that the optical device can be downsized.

Further, as shown in FIG. 24, a triangular prism-shaped transparent substrate 72 is adhered to the optical component 71 according to the present embodiment,
By mounting the three light receiving elements 8a, 8b, 8c on the substrate 72, the optical device can be modularized.

25 and 26 show the construction of an example of an optical device using the optical component 71 of this embodiment. In the optical system shown in FIG. 25, the LED (R) 6 that emits red light is used.
a, an LED (G) 6b that emits green light, and an LED (B) 6c that emits blue light, the emitted lights are combined by an optical component 71, and the target object 4 is passed through a projection lens 43.
Project to 4. The projected light is reflected by the target object 44 and is received by the PD 8 through the light receiving lens 45.

In the processing circuit shown in FIG. 26, the output from the main oscillation circuit 72 is converted into three oscillation circuits 73a, 73b, 7
3c, and outputs the time-shifted signal to the oscillation circuit 7c.
3a, 73b or 73c staggered time, LE separately
D (R) 6a, LED (G) 6b or LED (B) 6
Emit c to emit light. Next, the light received by the PD 8 is converted into a current, and this current is converted into a voltage by the amplifier 75. Three S / H (Sample hold) circuits 7 that synchronize this voltage with the outputs of the oscillation circuits 73a, 73b, and 73c, respectively.
6a, at 76b ,, 76c, R, G, voltage V _R of B,
Convert to V _G and V _B. In the color identification circuit 77, these three voltages V _R, V _G, by taking the ratio of V _B, can be identified color.

27 and 28 show the configuration of another example of an optical device using the optical component 71 of this embodiment. Figure 2
In the optical system shown in FIG. 7, the light emitted from the white light lamp 78 is projected onto the target object 44 through the projection lens 43. The projected light is reflected by the target object 44, reflected by the optical component 71 through the light receiving lens 45, and red light,
Divided into green light and blue light, PD8a, 8b, 8 respectively
Receive light at c,

In the processing system shown in FIG. 28, PD (R) 8a for receiving red light and PD (G) 8 for receiving green light.
and b, converts light respectively received in PD (B) 8c for receiving blue light, respectively amplifiers 75a, 75b, separately 75c voltage V _R, V _G, to the V _B. The color can be identified by the ratio of these three voltages V _R , V _G , and V _B being taken by the color identifying circuit 77.

In the optical component 71 shown in FIG. 23, the first
The characteristic of the optical multilayer film 1a is a characteristic of reflecting a part of the S-polarized component and transmitting a part or all of the P-polarized component, and the characteristic of the second optical multilayer film 1b is a characteristic of the S-polarized component. Or, it has a characteristic of reflecting all the light and reflecting a part of the P-polarized component,
By making the characteristic of the third optical multilayer film 1c such that it does not reflect the S-polarized light component but reflects part or all of the P-polarized light component, polarization separation becomes possible and it can be used as a substitute for the Wollaston prism. You can The optical component 71 can also be used for an optical head or the like.

FIG. 29 shows the structure of a fifteenth embodiment of the optical component of the present invention. In this embodiment, the number of substrates 3 in the fourteenth embodiment shown in FIG.
Optical multilayer films 1a, 1b, 1c and 1d are formed on the outer surfaces of b and 3c and on the middle four positions.

According to this embodiment, as in the fourteenth embodiment, the light can be divided into four in the same direction, and the optical device using the optical component 81 according to this embodiment can be miniaturized. In addition, each optical multilayer film 1a, 1b, 1c, 1
By setting the characteristic of d to the characteristic shown in FIG. 30, the color of the target object 44 can be identified and the surface condition can be detected. 30A shows the characteristics of the fourth optical multilayer film 1d that reflects only blue light, and FIG. 30B shows the characteristics of the third optical multilayer film 1c that reflects only green light. c) is the second optical multilayer film 1b that reflects only red light
The characteristic of FIG. 3D shows the characteristic of the first optical multilayer film 1a which reflects only infrared light.

31 and 32 show the construction of an example of an optical device using the optical component 81 of this embodiment. In the optical system shown in FIG. 31, an LED (IR) that emits infrared light
6a, LED (R) 6b that emits red light, LER (G) 6c that emits green light, LED that emits blue light
(B) The lights respectively emitted from 6d are combined by the optical component 81 and projected onto the target object 44 through the projection lens 43. The projected light is reflected by the target object 44 and is received by the PD 8 through the light receiving lens 45.

In the processing system shown in FIG. 32, the output from the main oscillating circuit 82 is converted into four oscillating circuits 83a, 83b, 8
3c or 83d are supplied with a time lag to drive any one of the oscillation circuits 83a to 83d, and the LED (I
The R) 6a, the LED (R) 6b, the LED (G) 6c, or the LED (B) 6d is separately emitted to emit light. next,
The light received by the PD 8 is converted into a current, and this current is converted into a voltage by the amplifier 85. This voltage is applied to the oscillation circuits 83a and 8a.
S / H in synchronization with the outputs of 3b, 83c, and 83d, respectively.
(Sample hold) circuit 86a, 86b, 86c or 8
Sample and hold at 6d, IR, R, G, B voltage V
Converting _IR, V _R, V _G, to the V _B. In the color identification circuit 87, of which three voltages V _R, V _G, by taking the ratio of V _B, can be identified color.

In the surface state detection circuit 88, 3
One of the voltage V _R, V _G, by taking the ratio of V _B and the voltage V _IR, it is possible to detect the surface state. Here, when the colored light is projected onto the target object 44, the intensity of the specularly reflected light differs depending on the roughness of the surface of the target object 44 and the wavelength of the colored light. When the color light has a constant wavelength, the intensity of the specular reflection light decreases as the surface roughness of the target object 44 increases. Also, the amount of decrease decreases as the wavelength becomes longer. By utilizing this, the intensity ratio of the red light, the blue light, and the green light to the infrared light changes due to the surface roughness of the target object 44, and the surface state can be detected by this change.

33 and 34 show the configuration of another example of an optical device using the optical component 81 of this embodiment. Figure 3
In the optical system shown in FIG. 3, the light emitted from the white light lamp 89 is projected onto the target object 44 through the light projecting lens 43. The projected light is reflected by the target object 44, reflected by the optical component 81 through the light receiving lens 45, and infrared light,
It is divided into red light, green light, and blue light, and PD8a,
Light is received at 8b, 8c, and 8d.

In the processing system shown in FIG. 34, a PD (IR) 8a for receiving infrared light and a PD for receiving red light.
(R) 8b and a PD (G) 8c for receiving green light, the light that each received a PD (B) 8d for receiving blue light, respectively amplifiers 85a, 85b, 85c, separately voltage V _IR with 85d , V _R , V _G , V _B. Of these four voltages, the ratio of V _R , V _G , and V _B is determined by the color identification circuit 8
By taking the value in 7, the color can be identified. In addition, the surface state detection circuit 88 uses the infrared light voltage V _IR and red,
The surface condition can be detected by taking the ratio with the voltages V _R , V _G , and V _B of the green and blue color lights.

[0087]

As described above, according to the optical component of the present invention and the optical device including the same, the glass substrate on which the optical multilayer film is formed is attached to the substrate made of a material other than glass to form the optical component. Since this optical component is configured and provided in an optical device that detects the presence or absence of an object, it is possible to improve the handleability of the optical component and the degree of freedom in design, and to provide an optical device having excellent optical characteristics.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a first embodiment of an optical component of the present invention.

FIG. 2 is an explanatory diagram showing the configuration of a second embodiment of the optical component of the present invention.

FIG. 3 is an explanatory diagram showing characteristics of the optical multilayer film of FIG.

4 is a diagram showing characteristics of transmittance and reflectance of each optical multilayer film of FIG.

FIG. 5 is a side view showing the configuration of the third embodiment of the optical component of the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a fourth embodiment of the optical component of the present invention.

FIG. 7 is a side view showing the configuration of a fifth embodiment of the optical component of the present invention.

FIG. 8 is a side view showing the configuration of a sixth embodiment of the optical component of the present invention.

FIG. 9 is a side view showing the configuration of a seventh embodiment of the optical component of the present invention.

FIG. 10 is a side view showing the configuration of an eighth embodiment of the optical component of the present invention.

FIG. 11 is a side view showing the configuration of the ninth embodiment of the optical component of the present invention.

FIG. 12 is a side view showing a configuration of a tenth embodiment of the optical component of the present invention.

FIG. 13 is a side view showing the configuration of an eleventh embodiment of the optical component of the present invention.

FIG. 14 is a diagram showing the characteristics of the transmittance of each substrate of FIG.

FIG. 15 is an explanatory diagram illustrating a configuration of an example of an optical device including the optical component of FIG.

FIG. 16 is a side view showing the configuration of the twelfth embodiment of the optical component of the present invention.

FIG. 17 is an explanatory diagram showing a configuration of an example of an optical component according to a thirteenth embodiment of the present invention and an example of an optical device including the optical component.

FIG. 18 is an enlarged view of a main part of FIG.

FIG. 19 is an explanatory diagram showing a configuration of an optical system of an example of an optical device using the optical component shown in FIG.

20 is a block diagram showing a processing system of the optical device of FIG.

FIG. 21 is an explanatory diagram showing a configuration of an optical system of another example of an optical device using the optical component shown in FIG.

22 is a block diagram showing a processing system of the optical device of FIG. 21. FIG.

FIG. 23 is a side view showing the configuration of the fourteenth embodiment of the optical component of the present invention.

24 is a side view showing a state in which a light receiving element is attached to the optical component shown in FIG.

25 is an explanatory diagram showing a configuration of an optical system of an example of an optical device including the optical component shown in FIG.

FIG. 26 is a block diagram showing a processing system of the optical device of FIG. 25.

FIG. 27 is an explanatory diagram showing a configuration of an optical system of an example of an optical device including the optical component shown in FIG. 23.

28 is a block diagram showing a processing system of the optical device of FIG. 27. FIG.

FIG. 29 is a side view showing the configuration of the fourteenth embodiment of the optical component of the present invention.

30 is a diagram showing the characteristics of the transmittance of the optical multilayer film of FIG. 29.

FIG. 31 is an explanatory diagram showing a configuration of an optical system of an example of an optical device including the optical component shown in FIG. 29.

32 is a block diagram showing a processing system of the optical device of FIG. 31. FIG.

FIG. 33 is an explanatory diagram showing a configuration of an optical system of another example of an optical device including the optical component shown in FIG. 29.

34 is a block diagram showing a processing system of the optical device of FIG. 33. FIG.

[Explanation of symbols]

 1 Optical Multilayer Film 2 Glass Substrate 3,51 Substrate 4 Adhesive 5,42,53,71,81 Optical Component 6 LED (Light Emitting Element) 7 Optical Axis 8 LD (Light Sensing Element) 11 Plastic Substrate (Polymer Material Substrate) 21 Antireflection film 31 Transparent conductive film 41 Transparent plastic substrate 43 Projecting lens 44 Target object 45 Light receiving lens 54 Reflector 55 Polarizing filter

Claims (25)

[Claims] 1. An optical component in which a first substrate and a second substrate are bonded together with a first optical multi-layer film sandwiched therebetween, wherein the first substrate is a substrate made of a material other than glass. And optical components. 2. The optical component according to claim 1, wherein the first substrate has a portion protruding from the second substrate. 3. The first optical multilayer film is formed on the first substrate, and the first optical multilayer film and the second substrate are bonded to each other. Optical components. 4. The first optical multilayer film is formed on the second substrate, and the first optical multilayer film and the first substrate are bonded to each other. Optical components. 5. The first optical multilayer film is formed on both the first substrate and the second substrate, and the first optical multilayer films are bonded to each other. The optical components described. 6. The optical component according to claim 1, further comprising a second optical multilayer film formed on the outer surface of the first substrate. 7. The optical component according to claim 1, wherein a second optical multilayer film is formed on the outer surface of the second substrate. 8. A third optical substrate further comprising a third substrate, and a second optical multilayer film is formed between the third substrate and the first or second substrate. 6. The optical component according to any one of 1 to 5. 9. The optical component according to claim 8, wherein a third optical multilayer film is formed on the outer surface of the third substrate. 10. An optical component in which a first optical multilayer film is formed on the outer surface of at least one of the substrates by adhering the first substrate and the second substrate with an adhesive. An optical component, wherein the substrate is a substrate made of a material other than glass. 11. The first substrate has a portion protruding from the second substrate.
The optical component described in. 12. The first substrate and the second substrate have substantially the same refractive index, and the first optical multilayer film is present between the first substrate and the second substrate. 11. The optical component according to claim 10, wherein the difference in refractive index between the substrate and the adhesive is 0.1 or less. 13. The one of the first substrate and the second substrate,
The optical component according to claim 10, wherein a second optical multilayer film is formed on the outer surface on the side where the first optical multilayer film is not formed. 14. The optical component according to claim 1, wherein the second substrate is also a substrate made of a material other than glass. 15. Of the first substrate and the second substrate,
At least one is a colored translucent board | substrate, The optical component in any one of Claim 1 thru | or 14 characterized by the above-mentioned. 16. Among the first substrate and the second substrate,
The optical component according to claim 1, wherein at least one of the substrates has an opening. 17. The method according to claim 6, wherein the first optical multi-layer film and the second optical multi-layer film have a function of separating into three lights having different wavelengths. Optical components. 18. The first optical multilayer film and the second optical multilayer film have a function of separating into three lights of a P-polarized component, an S-polarized component, and a P · S mixed component. The optical component according to claim 6, 7, 8 or 13. 19. The optical component according to claim 9, wherein the first, second and third optical multilayer films separate the light beams into four light beams having different properties. 20. An optical device comprising the optical component according to claim 6, wherein light incident on the optical component is reflected by the multilayer films formed at a plurality of locations. Then, the optical device is characterized in that it is divided into a plurality of light beams, and each of the plurality of light beams is received by a plurality of light receiving portions arranged on the same side as the optical component. 21. An optical device comprising the optical component according to claim 6 or 9, wherein a plurality of light emitting portions respectively emitted from a plurality of light emitting portions arranged on the same side as the optical component. An optical device, characterized in that a light beam is reflected by each of the multilayer films formed at a plurality of positions to be combined. 22. An optical device comprising the optical component according to claim 1. 23. The optical component is attached to another device by a substrate other than a glass material among the first substrate and the second substrate of the optical component.
The optical device according to. 24. The optical device according to claim 22, wherein the optical component is arranged in a diverging optical path or a converging optical path. 25. The optical device according to claim 22, further comprising a light receiving unit that receives light transmitted through or reflected by the optical component to detect a physical property or state of an object.