KR930010601A

KR930010601A - View frame coating layer structure using aluminum of viewfinder

Info

Publication number: KR930010601A
Application number: KR1019910019426A
Authority: KR
Inventors: 박경찬
Original assignee: 이헌조; 주식회사 금성사
Priority date: 1991-11-01
Filing date: 1991-11-01
Publication date: 1993-06-22

Abstract

투사와 반사를 동일 비율로 할 필요가 있는 광학계, 그리고 빛의 투과를 막아주고 대부분의 빛을 반사하여야 하는 광학소자, 예를들면 카메라에 있어서, 뷰파인더(view finder)의 알루미늄(Al)을 이용한 시야테(촬영전에 촬영대상의 구도를 맞추는 역할을 하는 부위)코팅(coating)층 구조에 관한 것으로, 플라스틱 기판(11)의 상면에 CeF₃층(12)과, 알루미늄층(13)과, CeF₃층(14)을 순차적으로 중착하거나, 글래스 기판(21)의 상면에 알루미늄층(22)과, SiO₂층(23)을 순차적으로 증착하여, 시야테 코팅층(2)에 알루미늄막을 형성함으로써 투과율 및 반사율의 변화를 거의 없애 특성을 향상시키며, 또한 알루미늄층의 보호막으로서 CeF₃와 SiO₂를 사용하여, 막의 밀차성 및 내구성을 향상시키고, 렌즈와 재질이 플라스틱 또는 글래스의 경우에도 적용이 가능하게 하도록 한 것이다.In the optical system that needs to have the same ratio of projection and reflection, and optical elements that prevent the transmission of light and reflect most of the light, such as cameras, aluminum is used in the view finder. The field of view (the part that plays a role in the composition of the subject before shooting) relates to the coating layer structure. The top surface of the plastic substrate 11 has a CeF₃ layer 12, an aluminum layer 13, and a CeF₃ layer. (14) is sequentially deposited or the aluminum layer 22 and the SiO2 layer 23 are sequentially deposited on the upper surface of the glass substrate 21 to form an aluminum film on the field frame coating layer 2, thereby improving the transmittance and reflectance. It almost eliminates the change, improves the properties, and also uses CeF₃ and SiO₂ as the protective layer of the aluminum layer to improve the film's density and durability, and make the lens and material applicable to plastic or glass. will be.

Description

View frame coating layer structure using aluminum of viewfinder

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제4도는 본 발명에 의한 뷰 파인더 렌즈 시스템의 접안 렌지를 보인 사시도, 제5도는 본 발명에 의한 뷰 파인더의 알루미늄을 이용한 시야테 코팅층의 일예를 보인 확대 단면도.4 is a perspective view showing the eyepiece range of the viewfinder lens system according to the present invention, Figure 5 is an enlarged cross-sectional view showing an example of a field frame coating layer using aluminum of the viewfinder according to the present invention.

Claims

A structure of a view frame coating layer using aluminum of a viewfinder, characterized by sequentially depositing a CeF 3 layer, an aluminum layer 13, and a CeF 3 layer 14 on a top plate of a plastic substrate 11.

2. The CeF3 layer 12 (14) according to claim 1, wherein the optical thickness (refractive index x actual thickness) is λ / 8 to λ / 4 (where λ is 420 nm as a reference wavelength). Field of view coating layer structure using aluminum of view finder characterized by.

The view frame coating layer structure of claim 1, wherein the aluminum layer 13 has a thickness of 15 nm for a half mirror and 90 to 100 nm for a total reflection mirror. .

An aluminum layer 22 and an SiO2 layer 23 are sequentially deposited on the upper surface of the glass substrate 21, and the cyate coating layer structure using aluminum of the viewfinder.

The structure of claim 4, wherein the aluminum layer has a thickness of 15 nm for a half mirror and 90 to 100 nm for a total reflection mirror.

The optical frame of claim 4, wherein the optical thickness of the SiO2 layer (23) is λ / 5 to λ / 3.

※ Note: The disclosure is based on the initial application.