JPS61296870A - Dark field monitor camera - Google Patents

Abstract

PURPOSE:To vary optical characteristics without any change in outward appearance by using an image pickup camera consisting of an MOS solid-state image pickup element, an optical system in front of it, and a control circuit arranged at the periphery of the optical system and providing a filter with a lens function. CONSTITUTION:The optical unit 5 is provided with a printed board 10 where the MOS solid-state image pickup element is installed in the center, a dark box 11 is installed covering the MOS solid-state image pickup element, and an optical lens 12 is arranged in front of the dark box. The control circuit is mounted on, for example, a printed board, etc., behind the speaker 8 in an enclosure 4. A proper number of infrared-light emitting diodes 13 are arranged for each part and those are turned on at the start of a call by, for example, the depression of a push button 3 and held on for a specific time. The filter 14 is provided with the lens function of a convex or concave lens and this filter 14 having the lens function is mounted detachably on the opening part 15 of the enclosure 4 to vary optical characteristics of the image pickup camera 1, varying the field angle freely.

Description

[Detailed Description of the Invention] [Technical Field] The present invention is a night vision system used when an imaging camera for monitoring is installed integrally with a doorbell used by visitors to enable them to talk to their family members indoors. This relates to monitor cameras.

[Background technology]

Conventionally, it has been proposed to integrate an imaging camera (1) into a doorbell, but in such conventional examples, the angle of view of the imaging camera ill is uniquely determined, and the angle of view of the imaging camera ill is uniquely determined, and the angle of view of the imaging camera ill is uniquely determined. It was impossible to change lenses. For this reason, at a fixed imaging distance, the range that can be imaged is determined, and depending on the mounting height and position of the door phone, it may not be possible to monitor the necessary image, and there are restrictions on the mounting height and mounting position. There was a big problem.

[Purpose of the invention]

The present invention provides a lens function to a filter that is installed so that the internal imaging camera lens and illumination light emitting means cannot be identified from the outside, and by replacing this filter, the angle of view can be changed freely. The object of the present invention is to provide a night-vision night vision camera with the following features.

[Disclosure of the invention]

FIG. 1 shows a front perspective view of an embodiment in which the present invention is applied to a door intercom 1,000 tickets, in which the optical unit (6) of the imaging camera (1) is placed on the top of the housing (4) and the bottom is placed on the bottom. A doorphone unit (6) is stored, and by operating the push button (3) at the lower front of the housing (4), a call is made to the doorphone parent (not shown) on the indoor side, and the speaker (8) and A microphone (9) enables communication with the inside of the room. A printed board (lO) with a MOS type solid-state image sensor (not shown) installed in the center of the optical unit +5+ f'i is provided, and a dark box Qt) is installed to cover the MOS type solid-state image sensor of this printed board (10). However, the control circuit (not shown), which constitutes the imaging camera (1) together with the optical unit (5), is configured by installing an optical lens in front of this dark box (+1), for example, in the housing ( It will be mounted on a printed circuit board (not shown) behind the speaker (8) in 4). Also, although not shown in FIGS. 2 and 3, there is a side portion of the dark box (11) of the printed board (lO).
An appropriate number of infrared emitting diodes (+3) are arranged, and these infrared emitting diodes (+3) can be used, for example, when pressing a push button (
It lights up when a call is started by pressing the button 3), and remains lit for a predetermined period of time. Also, these infrared diodes 03
) is lit intermittently with an output synchronized with the synchronization signal of the video signal of the imaging camera F11, which enables high-output lighting of the infrared emitting diode (l) and reduction of its power consumption. On the front surface of the optical unit (5) of (4), there is an opening Q- facing the optical lens (+2).
is provided, and a filter (14) is provided in this opening (l).
) is installed in a replaceable manner. Conventionally, this filter α had only the function of a normal blindfold filter, but in this case 1q, the filter (I4) has a function of 4! As shown in Figures J3 (a) and (b), the filter 90 is provided with a lens function as a convex lens or a concave lens, and the filter 90 having this lens function is replaceably attached to the opening α of the housing (4). This allows the angle of view to be freely changed by changing the optical characteristics of the imaging camera +1.

〔Effect of the invention〕

As described above, the present invention uses an imaging camera consisting of a MOS type solid-state image sensor, an optical system in front of it, and a control circuit arranged around this optical system, so the lens of the optical system can be made small. It is possible to
Since the control circuit can be placed separately from the optical system, it has the effect of making the entire imaging camera thinner and smaller.Moreover, since the filter is equipped with a function, the external appearance is It is the same as a regular filter, there are no problems such as deterioration of the external design, and it has the effect of changing the optical characteristics of the imaging camera to freely change the 5 angles of view, and the mounting position of the imaging camera. This has the effect that the necessary imaging range can always be covered even in cases where there are restrictions on the imaging range.

[Brief explanation of drawings]

Fig. 1 is a front perspective view of an embodiment of the present invention, Fig. 2 is a reduced perspective view with the same filter removed, and Figs. 3(a) and (b).
) is a schematic cross-sectional view of the main parts when the above filter has a convex lens function and a concave lens function, respectively.
(4) is a housing, θ is an optical lens, and Cl4) is a filter. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Procedure Guide 1 Outside the Square (Voluntary) 1986 Il'-9B 5 131 1985 Patent Application No. 138553 2 Name of Invention Night Vision Monitor Camera 3 , Relationship with the case of the person making the amendment Patent applicant address 1048 Kadoma, Kadoma City, Osaka Prefecture Name (58
3) Matsushita Electric Works Co., Ltd. Representative Sadao Fujii 4, agent postal code 530 5, date of amendment order Voluntary [11 The scope of claims in the specification of the present application is amended as follows. 111) Form an imaging camera consisting of an optical system consisting of an infrared ray-sensitive sub-plate image sensor and an optical lens in front of it, and a control circuit placed around this optical system, and install this imaging camera inside a housing. A blinding filter is removably installed in the opening of the housing facing the optical lens, and this filter is provided with a lens function to make the angle of view of the imaging camera variable. night vision monitor camera. ” [21 Doo, page 4 @ next to “Shidaderu.” at the 15th stroke [
Note that the solid-state image sensor may be a COD. ] Insert. [31 Same as above, page 4, number 17, rMOS type O8 imaging device" is corrected to "solid-state imaging device."

Claims (1)

[Claims] (1) An imaging camera is formed from an optical system consisting of a MOS solid-state image sensor sensitive to infrared light and an optical lens in front of it, and a control circuit arranged around this optical system. is housed in a housing, a blinding filter is removably installed in the opening of the housing facing the optical lens, and this filter is provided with a lens function to make the angle of view of the imaging camera variable. A night vision monitor camera featuring: