JPH08292359A - Optical equipment - Google Patents

Abstract

PURPOSE: To provide an optical equipment with which satisfactory optical performance is attained by correcting out-of-focus even when there is any environmental change. CONSTITUTION: Concerning the optical equipment for forming an object image on an image forming plane while using an optical system provided with mobile lens groups 102 and 104, this equipment is provided with lens driving means 5 and 6 for driving the mobile lens groups 102 and 104, control means 13 for controlling the lens driving means 5 and 6, storage means 14 for storing control information for driving the mobile lens groups 102 and 104, and detecting means 21-24 for detecting temperature information or/and humidity information on the optical system, the control information contains temperature correction coefficient data or/and humidity correction coefficient data for correcting the position data based on signals from the detecting means 21-24, and the control means 13 controls the lens driving means 5 and 6 based on the control information so that the fluctuation of the image forming plane position of the optical system caused by the temperature change or/and the humidity change can be corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a video camera, a silver salt camera, an electronic still camera, etc. System), for example, an optical device such as a photographing lens having a single focal length and an optical system such as a zoom lens, which corrects out-of-focus when an environmental change occurs by the moving lens.

[0002]

2. Description of the Related Art Recently, in optical devices such as cameras,
The downsizing of imaging optical systems and the downsizing of image sizes of solid-state imaging devices are rapidly advancing. Further, plastic materials are often used as optical materials constituting the photographing optical system. When a plastic material is used, the lens can be easily molded by a mold, its shape is highly arbitrary, and its cost advantage is large compared to a glass material. For this reason, lenses made of plastic materials are often used in finder systems, infrared active autofocus units, and part of photographic optical systems.

Plastic materials have a greater change in physical properties with respect to environmental changes than inorganic glass materials. For example, PMMA, which has a large linear expansion coefficient, has a typical value of 67.9 × 10 ⁻⁶ / ° C., whereas LaK 14 (made by OHARA) of inorganic glass has 57 × 10 6.
^-7 / ℃, an order of magnitude smaller. Regarding the change of the refractive index with respect to the temperature change, PMMA has a typical value of 1.0 to 1.2 × 1.
While it is 0 ⁻⁴ / ° C., the LaK 14 has a D-line of 3.9 to 4.4 × 10 ⁻⁶ / ° C., which is two digits smaller.

As described above, the plastic material has a greater change in optical constants (refractive index, shape, etc.) with respect to temperature change than the inorganic glass material. For example, a lens made of a plastic material, that is, a so-called plastic lens, has a focal length largely changed with respect to a temperature change as compared with a lens made of an inorganic glass material.

Further, the plastic material has a higher water absorption rate than the inorganic glass material. For this reason, the optical constants of the plastic lens change greatly with respect to changes in temperature as well as changes in humidity as compared with lenses made of an inorganic glass material.

[0006]

If a plastic lens is used as a part of the optical system, the above-mentioned effects can be obtained.
However, on the other hand, when environmental changes, particularly temperature changes and humidity changes, there arises a problem that optical properties such as a focal length greatly change as compared with the case where a lens made of an inorganic glass material is used.

Recent optical devices have been downsized in order to downsize the taking optical system, downsize the solid-state image pickup device, and increase the density of each element. For this reason, there is a problem in that the influence of the deviation of the image plane of the optical system used in the optical device on the planned image plane due to temperature change, humidity change, etc. becomes large. Therefore, how to effectively correct the deviation of the image forming position due to such environmental changes is a big problem.

According to the present invention, when an optical system (photographing lens) having a movable lens group that moves on the optical axis for focusing or zooming is used, there is a change in environment, for example, a change in temperature or a change in humidity. Also, a video camera, a silver-salt camera, and an electronic still camera that can correct the deviation of the image forming plane by appropriately setting the movement locus of the moving lens group each time according to environmental changes and maintain high optical performance It is an object of the present invention to provide an optical device suitable for the above.

[0009]

The optical device of the present invention comprises: (1) In an optical device for forming an object image on an image plane by an optical system including a moving lens group, a lens drive for driving the moving lens group. Means, control means for controlling the lens driving means, storage means for storing control information for driving the movable lens group, and detection means for detecting temperature information and / or humidity information regarding the optical system, The control information includes a plurality of position data of the movable lens group at the reference temperature and / or the reference humidity and temperature correction coefficient data or / and humidity correction coefficient data for correcting the position data based on the signal from the detection means. That is, the control means controls the lens driving means based on the control information to correct the fluctuation of the image plane position of the optical system due to the temperature change and / or the humidity change. Features.

(1-1) The optical device is a video camera. (1-2) The optical system is a rear focus type zoom lens. (1-3) The optical system has a plurality of lens groups, and the plurality of lens groups have a plastic lens in at least a part thereof. (1-4) The control means extracts the control information for controlling the drive means from the storage means according to the temperature or / and the humidity detected by the detection means, and moves the control information based on the control means. Calculate temperature correction position data and / or humidity correction position data of the lens group. (1-5) The temperature correction position data is defined as a function of a difference value between the temperature detected by the detection means and the reference temperature. (1-6) The humidity correction position data is defined as a function of a difference value between the humidity detected by the detecting means and the reference humidity.

(1-7) The temperature correction position data is obtained by multiplying the temperature correction coefficient data by the difference value between the temperature detected by the detecting means and the reference temperature, and the moving lens group at the reference temperature. Be defined by adding the position data of. (1-8) The temperature correction coefficient should be defined as a function of the position of the moving lens group for zooming. (1-9) The humidity correction position data is the position data of the moving lens group at the reference humidity obtained by multiplying the difference value between the humidity detected by the detecting means and the reference humidity by the humidity correction coefficient data. Be defined as the sum of. (1-10) The humidity correction coefficient should be defined as a function of the position of the moving lens group for zooming. (1-11) The temperature information detecting means has at least one sensor using a temperature sensitive resistor. (1-12) The temperature information detecting means has at least one sensor using a thermistor. (1-13) The humidity information detecting means has at least one capacitance type sensor. (1-14) The humidity information detecting means has at least one sensor using a thermistor. And so on.

[0012]

Embodiment 1 FIG. 1 is a block diagram of the essential parts of Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes an optical system, which comprises a so-called four-group rear focus lens (hereinafter referred to as "RFZ" lens) composed of four lens groups.

The RFZ lens 1 is a first fixed lens group.
Lens group (hereinafter, referred to as “front lens”) 101, a second lens group (hereinafter, referred to as “variator”) 102 that is a moving lens group and has a variable power function, and a third lens group that is a fixed lens group.
Lens group (hereinafter referred to as “afocal”) 103,
It is composed of a focus which is a moving lens group and a fourth lens group (hereinafter referred to as "RR") 104 which has a function as a compensator for correcting an image plane variation due to zooming.

Actually, the lens group is composed of a plurality of lenses. For example, in this embodiment, the front lens 10 is used.
1 for 3 sheets, variator 102 for 3 sheets, afocal 10
The lens structure 3 is composed of one lens, and the RR 104 is composed of two lenses.

In this embodiment, a plastic lens made of a plastic material is used for at least one lens group of each lens group. As the material of the plastic lens, acrylic type, polyolefin type, polycarbonate and the like can be applied.

In the present embodiment, where in the lens group the plastic lens is used is not particularly limited,
In some cases, it may not be used in each lens group.

Reference numeral 102a denotes a member for holding the variator 102 (hereinafter referred to as "V moving ring"), and 104a denotes a member for holding the RR 104 (hereinafter referred to as "RR moving ring").
It is manufactured by molding with a mold or cutting using PC (polycarbonate).

In the present invention, the above materials and manufacturing method are not particularly limited, and other than the above, for example, a metal material such as aluminum or titanium formed by die casting, or a secondary processing after die casting is performed. It may be manufactured by, or directly cut from a block.

Reference numeral 2 denotes a member for holding the lens group (hereinafter referred to as "lens barrel"), which is manufactured by molding with a mold using PC (polycarbonate) or cutting.

In the present invention, the above materials and manufacturing method are not particularly limited. In addition to the above, for example, a metal material such as aluminum or titanium is formed by die casting, or is formed by secondary processing after die casting. It may be cut or directly cut from a block. Further, the lens barrel 2 may be formed by being divided into several members and is not particularly limited in the present invention.
For example, with respect to the optical axis 105 of the RFZ lens 1, a cylindrical or box-shaped lens barrel 2 may be formed of two members that are parallel to the optical axis 105, or perpendicular to the optical axis 105. It may be formed from two members divided into two members, or two members each.
Not only the member but also several members may be formed.

In this embodiment, the front lens 101 and the afocal 103 are fixed to the lens barrel 2 after being fixed to the holding members 101a and 103a, respectively, but they may be directly fixed to the lens barrel 2. Good, without any particular limitation.

Reference numeral 3 denotes a diaphragm member for adjusting the amount of light incident on the photoelectric conversion element 18 such as CCD, and the diaphragm blade 3a in the diaphragm member 3 is moved to the optical axis 105 by the driving means 7 such as an iG meter or a STEP motor. By driving the diaphragm member 3 substantially vertically, the area of the opening 3b of the diaphragm member 3 is variable. 9
Is a diaphragm encoder that detects the rotation angle of the iG meter.

A diaphragm control circuit 20 and a drive circuit 1 are used to adjust the light quantity.
The area of the opening 3b is controlled by driving the diaphragm blades 3a of the diaphragm member 3 by the driving means 7 so that the amount of light incident on the photoelectric conversion element 18 becomes constant by 6. A detection circuit 22 detects a signal from the diaphragm encoder 9.

In the present embodiment, the mechanical diaphragm member 3, the driving means 7 and the encoder 9 constitute the diaphragm unit, but the invention is not limited to this, and the electrochromic control for controlling the absorption of light by an electrochemical action. It may be a physical property diaphragm having a Mie function or the like.

Reference numeral 4 is a filter unit placed in front of the photoelectric conversion element 18, and has an optical low-pass filter 4a such as a crystal, an infrared cutoff filter 4b and the like.

In this embodiment, each filter 4a, 4b
Are integrally arranged immediately in front of the photoelectric conversion element 18, but they may be separately arranged, or may be arranged at arbitrary positions where the function of each filter of the RFZ lens 1 can be exerted.

Reference numerals 5 and 6 designate movable lens groups 102 and 104, respectively.
Is a driving means (lens driving means) such as a step motor for driving the. Reference numerals 5a and 6a denote lead screw screws each having a thread formed on the surface thereof at a predetermined pitch. 10
2b and 104b are V moving ring 102a and RR moving ring 1 respectively.
The rack is formed as the same member as 04a or is integrally formed as a separate member to the V moving ring 102a and the RR moving ring 104a by adhesion or the like. The racks 102b and 104
b is meshed with the lead screw screws 5a and 5b, and when the step motors 5 and 6 rotate forward and backward, the V moving ring 102a and the RR moving ring 104a move parallel to the optical axis 105.

Reference numerals 8a and 10a are photo interrupters, and 8b and 10b are light shielding plates, which are formed as the same member as the V moving ring 102a and the RR moving ring 104a, respectively, or as a separate member, the V moving ring 102a, It is integrally formed with the RR moving ring 104a by adhesion or the like. The light shielding plates 8b and 10b are the V moving ring 102a and the RR moving ring 104.
The signal from the photo interrupters 8a and 10a is changed by moving to the position of the photo interrupters 8a and 10a by the movement of a, and the reference position of the variator 102 and the RR 104 is detected by detecting this change (hereinafter, "lens initial reset position"). It is determined).

In this embodiment, relative position information from the initial reset position of each lens is detected by counting the number of drive pulses for driving the step motor with respect to the lens initial reset position.

The photo interrupter 8a (10a) and the light shielding plate 8b (10b) constitute one element of the lens initial position detecting means. 21 and 23 are photo interrupters 8
It is a detection circuit for detecting signals from a and 10a.

In this embodiment, the photo interrupters 8a and 10a and the light shielding plate 8 are used as the lens initial position detecting means.
Although the combination of b and 10b is adopted, for example, a combination of Hall element and magnet, PSD and iRED
You may use the combination of these.

Further, in this embodiment, the combination of the step motor and the lens initial reset position detecting means is adopted, but the lens position detection by the combination of the voice coil motor, the DC motor and the like and the magnetoresistive effect element, or the hall element and the magnet and the like. It may be combined with any means and is not particularly limited.

Reference numerals 15 and 17 denote STs as lens driving means.
It is a drive circuit for driving the EP motors 5 and 6. 1
Reference numeral 2 is a temperature detecting means of a temperature sensitive resistance such as a thermistor as a detecting means, and an output signal corresponding to the temperature is output by the detecting circuit 24 to a control circuit 13 such as a microcomputer.

In this embodiment, the temperature detecting means 12 is arranged near the front lens 101. This is because the amount of change in the focal length with respect to the temperature change of the front lens 101 is larger than that of the other lens groups in calculation. The position where the temperature detecting means 12 is placed is not particularly limited.

A camera process circuit 19 processes the output signal from the photoelectric conversion element 18 and outputs it as an image signal. Reference numeral 14 is a storage means such as a ROM that stores drive information of the variator 102 and the RR 104.

In FIG. 1, the control circuit 13 and the ROM 14
Is expressed as a separate block, the control circuit 13 and the ROM 14 may be incorporated in the microprocessor.

Reference numeral 11 denotes a zoom switch, which is a zoom switch 11a for zooming to the wide-angle side (hereinafter referred to as "WIDE") and a zoom switch 11b for zooming to the telephoto side (hereinafter referred to as "TELE").
The zooming operation is performed by pressing. That is, the variator 102 and the RR 104 are driven by the drive signal from the control circuit 13 to perform zooming. 25 is a power supply.

In the RFZ lens 1, the lens stop position on the optical axis of the variator 102, that is, the stop position on the optical axis of the RR 104 with respect to the zoom position is determined for each subject distance.

FIG. 2 shows the variator 102 for each subject distance.
And a plot of stop positions on the optical axis of the RR 104 (hereinafter referred to as "cam locus").

In FIG. 2, for example, when the subject distance is infinity, when the variator 102 moves from WIDE to TELE on the optical axis, the RR lens 104 curves Y∞ (Y2).
As described above, the object moves on the optical axis while having a convex locus.

As described above, in this embodiment, WIDE to T
When zooming from ELE or TELE to WIDE, the RR 104 is driven and controlled according to the movement of the variator 102 based on the cam locus stored in the memory so as to trace the cam locus according to the subject distance. As a result, a good image with no out-of-focus is obtained.

In this embodiment, a plastic lens is used for at least one lens group. For this reason, when the temperature and humidity change around the plastic lens due to environmental changes, the shape of the plastic lens changes as described above, and the refractive index changes because the temperature coefficient of the refractive index of the material is large. The focal length changes greatly. In the following description, temperature changes will be mainly described as environmental changes.

When the temperature changes, the focal length of each lens group changes, and the total focal length of the RFZ lens 1 also changes. As a result, the image forming surface deviates from the image forming surface at the reference temperature Tref (which is set to 20 ° C. in this embodiment). That is, a focus shift occurs. Therefore, when a temperature change occurs during zooming, it is necessary to correct the cam locus tracing the moving lens group so as to correct the deviation of the image plane caused by the temperature change.

In FIG. 3, when the temperature is (Tref + 30) ° C. with respect to the reference temperature Tref = 20 ° C., (Tref-
30) Shows the cam locus when the subject distance is infinite at the temperature of 30 ° C.

In this embodiment, when the temperature becomes higher than the reference temperature Tref, the amount of extension of the RR lens 104 toward the object side becomes large, and conversely, when the temperature becomes lower than the reference temperature Tref, the amount of extension becomes smaller.

In this embodiment, the TELE end has the largest focus shift with respect to the temperature change.

In this embodiment, the variator 102 and RR10 are used.
The representative position data PRR at the reference temperature Tref, which is the amount of extension of the RR 104 to the object side for each object distance with respect to the position PV of the variator 102 in the movable range of the optical axis 4, is stored in the ROM 14 in advance. RR1 for each subject distance with respect to the position PV of the variator 102
Similarly, the temperature correction coefficient CPRR of the position data PRR 04 is also stored in the ROM 14 in advance.

In this embodiment, the movable range of the variator 102 is divided by a predetermined width, and the representative position data PRR at the reference temperature Tref of the RR 104 for each subject distance and the RR10 for each subject distance are divided for each divided region of the variator 102.
The temperature correction coefficient CPRR of the position data PRR of No. 4 is stored in the ROM 14 in advance as numerical data.

However, the present embodiment is not limited to this. For example, the position data P of the variator 102
V does not have to be divided into a predetermined width, and in that case, the representative position data PRR of the RR 104 for each subject distance described above.
The temperature correction coefficient CPRR may be defined as a function of the position data PV of the variator 102. Moreover, the temperature correction coefficient C
The PRR considers the influence of the focus shift due to the change of the focal length of the plastic lens when the temperature changes with respect to the reference temperature Tref and the change of the lens interval due to the expansion and contraction of the holding member that holds each lens group of the optical system 1. It was calculated by

In this embodiment, when the temperature information data T obtained by the temperature sensitive resistor 12 and the detection circuit 24 has a temperature difference with respect to the reference temperature Tref, the representative position data PRR of the moving lens group is obtained. The temperature position data PRRT of the RR 104 is calculated by performing correction using the temperature correction coefficient and the temperature difference. That is, it is calculated by the following formula.

PRRT = CPRR × (T−Tref) + PRR However, the present embodiment is not limited to this, and changes in the feed amount of the RR 104 due to temperature changes can be performed by an arbitrary function (for example, a quadratic expression or a cubic expression). , Quartic equation, exponential function, logarithmic function, etc.).

The operation of this embodiment will be described below with reference to FIGS.
It will be described with reference to the flowchart shown in FIG.

First, the power supply 25 is turned on. Next, the signals from the photo interrupters 8a and 10a are detected by the respective detection circuits 2.
Read through 1 and 23. Next, in the control circuit 13, the direction corresponding to each read signal, that is, in the present embodiment, the signals from the detection circuits 21 and 23 are low when it is high, and high when it is low. The variator 102 and the RR 104 are driven in the respective directions, and the variator 102 and the RR 104 are driven until the signals from the photo interrupters 8a and 10a change.

The changed positions of the signals of the photo interrupters 8a and 10a are set to the lens variators 102 and RR10.
4 are the initial reset positions. That is, the variator 102 and the RR 104 are stopped at the position where the signal changes, and the variator 102 and the RR 10 in the control circuit 13 are stopped.
Clear each counter of 4. The counter counts the drive pulses of the variator 102 and RR104, and thereby the variator 102 and the RR104.
The current position relative to the initial reset position of is detected.

It is checked whether the zoom switch 11 is pressed. W when the zoom switch 11a is pressed
Zooming is performed in the IDE direction, and the zoom switch 11b
When is pressed, zooming is performed in the TELE direction. If it is not pressed, zooming does not work.

Only the case of zooming in the TELE direction will be described below, but the routine is completely the same in the WIDE direction, and therefore will be omitted.

The position PV of the variator 102 from the counter
Is read out to find out in which divided area of the variator 102 the area PV of the current variator 102 is present.
Decide on V. Similarly, the position PRR of the RR 104 is read from the counter.

Next, the output signal from the temperature sensitive resistor 12 arranged around the front lens 101 is passed through the detection circuit 24 to the control circuit 1.
By inputting in 3, the temperature T of the place where the temperature sensitive resistor 12 is placed is detected. After the power is turned on, t
The detected temperature after the second is T (t).

Actually, in the present embodiment, the control circuit 13
Is a microprocessor (hereinafter referred to as "microcomputer")
Since the detected temperature is fetched as data in the microcomputer according to the sampling frequency of the microcomputer, the above T
Let (t) be represented as T (k), where k is the number of times the detected temperature data is taken in every predetermined time since the power was turned on.

In the present embodiment, it is essential that the detected temperature data string is a function of time, and the expression method is not particularly limited.

Next, the detected environmental temperature T (k) and the reference temperature Tref are compared and the difference ΔT (= T (k) -Tr
ef). Then, the temperature correction coefficient CPRR is read and multiplied by ΔT (ΔT × CPRR). This result is added to the representative position data PRR of the reference temperature (Δ
The delivery amount of the RR 104 is calculated by (T × CPRR + PRR). Variator 1 based on the above calculation data
02 and RR104 are driven respectively.

The operation during zooming has been described above. Although the description has been given on the assumption that the autofocus is not operated during zooming, it is clear that the operation does not cause any trouble.

As described above, with the configuration of this embodiment, even when there is a temperature change during zooming and during AF operation, or when there is a deviation from the reference temperature even if the temperature is constant. Also, it is possible to obtain a good image with no out-of-focus.

In this embodiment, the thermistor 12 is set to 1
Although individual pieces are used, a plurality of pieces may be used, and a better effect can be obtained.

FIG. 6 is a block diagram of the essential parts of the second embodiment of the present invention. In the figure, the same elements as those shown in FIG. 1 are designated by the same reference numerals.

This embodiment shows a case where the humidity changes as the environment changes. In FIG. 6, reference numeral 26 is a humidity detecting sensor using a capacitance type or a thermistor. Reference numeral 27 is a detection circuit for detecting humidity by the output from the humidity detection sensor 26, and outputs an output signal corresponding to the detected humidity information to the control circuit 13.

In the present embodiment, the focus shift when the focal length is changed due to the shape change of the plastic lens and the refractive index change of the material when the humidity is changed as the environmental change is the same as that when the temperature is changed in the first embodiment. The difference is that they are corrected by the above, and the other basic configurations are the same.

Regarding the configuration, only the humidity sensor, the humidity detection circuit, and the humidity correction coefficient data are different. Elements corresponding to this in the first embodiment are a temperature sensor, a temperature detection circuit, and temperature correction coefficient data, respectively.

Next, the operation of this embodiment will be described. In this embodiment, a plastic lens is used for each lens group. Therefore, when the plastic lens changes in humidity due to environmental changes, the shape of the plastic lens changes due to change in moisture absorption, the focal length of each lens group changes, and the focal length of the entire system of the RFZ lens 1 also changes. . As a result, when zooming by manual focus, the reference humidity Hr relative to the position of the variator 102 is increased.
RR of ef (set to 50% in this embodiment)
It is difficult to obtain a good image without blurring according to the data of the feeding amount of 4.

Therefore, in the present embodiment, the humidity correction coefficient data is provided in the same manner as in the first embodiment, so that R at the reference humidity is obtained.
Good zooming performance is obtained by correcting the representative position data of R104.

Although one humidity detecting sensor 26 is used in this embodiment, a plurality of humidity detecting sensors 26 may be used, and a better effect can be obtained.

In each of the above embodiments, the case where the temperature detecting means and the humidity detecting means are provided has been described.
Both detecting means may be provided in the optical device, and the focus shift due to the temperature change and the humidity change may be similarly corrected by using the method shown in each embodiment.

[0073]

As described above, according to the present invention, when an optical system (photographing lens) having a movable lens group which moves on the optical axis for focusing or zooming is used, when an environmental change occurs, for example, A video camera capable of correcting the deviation of the image plane and appropriately maintaining the high optical performance by appropriately setting the movement locus of the moving lens group according to the environmental change even if there is a temperature change or a humidity change. It is possible to achieve an optical device suitable for a silver halide camera, an electronic still camera, and the like.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a cam locus of the moving lens group in FIG.

FIG. 3 is an explanatory diagram showing a change of a cam locus with respect to a temperature change.

FIG. 4 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical system 102,104 Moving lens group 2 Lens barrel 5,6 Lens drive means 12 Temperature detection means 26 Humidity detection means 13 Control means 14 Storage means 15-17 Drive circuits 21-24 Detection circuit

Claims (15)

[Claims] 1. An optical device for forming an object image on an image forming plane by an optical system including a moving lens group, a lens driving means for driving the moving lens group, a control means for controlling the lens driving means, and the movement. Storage means for storing control information for driving the lens group and detection means for detecting temperature information and / or humidity information regarding the optical system are provided, and the control information is the moving lens at a reference temperature or / and reference humidity. It includes a plurality of position data of the group and temperature correction coefficient data or / and humidity correction coefficient data for correcting the position data based on the signal from the detection means, and the control means based on the control information. An optical device characterized in that the lens driving means is controlled to correct a change in the image plane position of the optical system due to a temperature change and / or a humidity change. 2. The optical device according to claim 1, wherein the optical device is a video camera. 3. The optical apparatus according to claim 1, wherein the optical system is a rear focus type zoom lens. 4. The optical device according to claim 1, wherein the optical system has a plurality of lens groups, and the plurality of lens groups have a plastic lens at least in a part thereof. 5. The control means extracts the control information for controlling the drive means from the storage means according to the temperature and / or the humidity detected by the detection means,
The optical apparatus according to claim 1, wherein temperature correction position data and / or humidity correction position data of the movable lens group is calculated based on the control means. 6. The optical device according to claim 5, wherein the temperature correction position data is defined as a function of a difference value between the temperature detected by the detection means and the reference temperature. 7. The optical device according to claim 5, wherein the humidity correction position data is defined as a function of a difference value between the humidity detected by the detecting means and the reference humidity. 8. The temperature correction position data is obtained by multiplying a difference value between a temperature detected by the detecting means and the reference temperature by the temperature correction coefficient data, and a position data of the movable lens group at the reference temperature. The optical device according to claim 5, wherein the optical device is defined by adding 9. The optical apparatus according to claim 1, wherein the temperature correction coefficient is defined as a function of the position of the moving lens unit for zooming. 10. The humidity correction position data is obtained by multiplying a difference value between the humidity detected by the detecting means and the reference humidity by the humidity correction coefficient data, and the position data of the movable lens group at the reference humidity. The optical device according to claim 5, wherein the optical device is defined by adding 11. The optical device according to claim 1, wherein the humidity correction coefficient is defined as a function of the position of the moving lens unit for zooming. 12. The optical device according to claim 1, wherein the temperature information detecting means has at least one sensor using a temperature sensitive resistor. 13. The optical apparatus according to claim 1, wherein the temperature information detecting means has at least one sensor using a thermistor. 14. The optical apparatus according to claim 1, wherein the humidity information detecting means has at least one capacitance type sensor. 15. The optical apparatus according to claim 1, wherein the humidity information detecting means has at least one sensor using a thermistor.