要解决Angular中的Http拦截器未正确接收HTTP标头的问题，你可以按照以下步骤进行操作：

1. 确保在拦截器中正确设置了observe选项为'response'，以便完整接收HTTP响应的标头信息。

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class MyInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest, next: HttpHandler): Observable> {
    const modifiedReq = req.clone({
      setHeaders: {
        'Content-Type': 'application/json'
      },
      observe: 'response' // 确保设置了observe选项为'response'
    });

    return next.handle(modifiedReq);
  }
}

2. 确保在使用拦截器的模块中正确地将拦截器提供给HTTP_INTERCEPTORS令牌。

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';

import { MyInterceptor } from './my-interceptor';

@NgModule({
  imports: [
    HttpClientModule
  ],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: MyInterceptor,
      multi: true
    }
  ]
})
export class MyModule { }

3. 在应用程序中使用HTTP服务时，确保导入了HttpClientModule模块。

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule } from '@angular/common/http';

import { AppComponent } from './app.component';

@NgModule({
  imports: [
    BrowserModule,
    HttpClientModule // 确保导入了HttpClientModule模块
  ],
  declarations: [AppComponent],
  bootstrap: [AppComponent]
})
export class AppModule { }

通过按照以上步骤进行操作，你应该能够正确接收到HTTP拦截器中的标头信息。